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link管理  ›  Color API documentation
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https://topologic.app/topologicpy_doc/topologic_pdoc/Color.html
悲伤的茄子
2 月前
# Wassim Jabi # This program is free software: you can redistribute it and/or modify it under # the terms of the GNU Affero General Public License as published by the Free Software # Foundation, either version 3 of the License, or (at your option) any later # version. # This program is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS # FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more # details. # You should have received a copy of the GNU Affero General Public License along with # this program. If not, see . import plotly.colors import math class Color: @staticmethod def ByCSSNamedColor(color, alpha: float = None): Creates a Color from a CSS named color string. See https://developer.mozilla.org/en-US/docs/Web/CSS/named-color Parameters ---------- color : str A CSS named color. alpha : float , optional THe desired alpha (transparency value). The default is None which means no alpha value will be included in the returned list. Returns ------- The color expressed as an [r, g, b] or an [r, g, b, a] list. import warnings import os import webcolors except: print("Color.ByCSSNamedColor - Information: Installing required webcolors library.") os.system("pip install webcolors") except: os.system("pip install webcolors --user") import webcolors print("Color.ByCSSNamedColor - Information: webcolors library installed correctly.") except: warnings.warn("Color.ByCSSNamedColor - Error: Could not import webcolors library. Please manually install webcolors. Returning None.") return None if not alpha == None: if not 0.0 <= alpha <= 1.0: print("Color.ByCSSNamedColor - Error: alpha is not within the valid range of 0 to 1. Returning None.") return None # Get RGB values from the named CSS color rgbList = list(webcolors.name_to_rgb(color)) if not alpha == None: rgbList.append(alpha) return rgbList except ValueError: print(f"Color.ByCSSNamedColor - Error: '{color}' is not a valid named CSS color. Returning None.") return None @staticmethod def ByHEX(hex: str, alpha: float = None): Converts a hexadecimal color string to RGB color values. Parameters ---------- hex : str A hexadecimal color string in the format '#RRGGBB'. alpha : float , optional The transparency value. 0.0 means the color is fully transparent, 1.0 means the color is fully opaque. The default is None which means no transparency value will be included in the returned color. Returns ------- The color expressed as an [r, g, b] or an [r, g, b, a] list. if not isinstance(hex, str): print("Color.HEXtoRGB - Error: The input hex parameter is not a valid string. Returning None.") return None if not alpha == None: if not 0.0 <= alpha <= 1.0: print("Color.ByHEX - Error: alpha is not within the valid range of 0 to 1. Returning None.") return None hex = hex.lstrip('#') if len(hex) != 6: print("Color.HEXtoRGB - Error: Invalid hexadecimal color format. It should be a 6-digit hex value. Returning None.") return None r = int(hex[0:2], 16) g = int(hex[2:4], 16) b = int(hex[4:6], 16) rgbList = [r, g, b] if not alpha == None: rgbList.append(alpha) return rgbList @staticmethod def ByValueInRange(value: float = 0.5, minValue: float = 0.0, maxValue: float = 1.0, alpha: float = None, colorScale="viridis"): Returns the r, g, b, (and optionally) a list of numbers representing the red, green, blue and alpha color elements. Parameters ---------- value : float , optional The input value. The default is 0.5. minValue : float , optional the input minimum value. The default is 0.0. maxValue : float , optional The input maximum value. The default is 1.0. alpha : float , optional The alpha (transparency) value. 0.0 means the color is fully transparent, 1.0 means the color is fully opaque. The default is 1.0. useAlpha : bool , optional If set to True, the returns list includes the alpha value as a fourth element in the list. colorScale : str , optional The desired type of plotly color scales to use (e.g. "Viridis", "Plasma"). The default is "Viridis". For a full list of names, see https://plotly.com/python/builtin-colorscales/. Returns ------- The color expressed as an [r, g, b] or an [r, g, b, a] list. if not alpha == None: if not 0.0 <= alpha <= 1.0: print("Color.ByValueInRange - Error: alpha is not within the valid range of 0 to 1. Returning None.") return None # Code based on: https://stackoverflow.com/questions/62710057/access-color-from-plotly-color-scale def hex_to_rgb(value): value = str(value) value = value.lstrip('#') lv = len(value) returnValue = tuple(int(value[i:i + lv // 3], 16) for i in range(0, lv, lv // 3)) return str(returnValue) def get_color(colorscale_name, loc): from _plotly_utils.basevalidators import ColorscaleValidator # first parameter: Name of the property being validated # second parameter: a string, doesn't really matter in our use case cv = ColorscaleValidator("colorscale", "") # colorscale will be a list of lists: [[loc1, "rgb1"], [loc2, "rgb2"], ...] colorscale = cv.validate_coerce(colorscale_name) if hasattr(loc, "__iter__"): return [get_continuous_color(colorscale, x) for x in loc] color = get_continuous_color(colorscale, loc) color = color.replace("rgb", "") color = color.replace("(", "") color = color.replace(")", "") color = color.split(",") final_colors = [] for c in color: final_colors.append(math.floor(float(c))) return final_colors def get_continuous_color(colorscale, intermed): Plotly continuous colorscales assign colors to the range [0, 1]. This function computes the intermediate color for any value in that range. Plotly doesn't make the colorscales directly accessible in a common format. Some are ready to use: colorscale = plotly.colors.PLOTLY_SCALES["Greens"] Others are just swatches that need to be constructed into a colorscale: viridis_colors, scale = plotly.colors.convert_colors_to_same_type(plotly.colors.sequential.Viridis) colorscale = plotly.colors.make_colorscale(viridis_colors, scale=scale) :param colorscale: A plotly continuous colorscale defined with RGB string colors. :param intermed: value in the range [0, 1] :return: color in rgb string format :rtype: str if len(colorscale) < 1: raise ValueError("colorscale must have at least one color") if intermed <= 0 or len(colorscale) == 1: c = colorscale[0][1] return c if c[0] != "#" else hex_to_rgb(c) if intermed >= 1: c = colorscale[-1][1] return c if c[0] != "#" else hex_to_rgb(c) for cutoff, color in colorscale: if intermed > cutoff: low_cutoff, low_color = cutoff, color else: high_cutoff, high_color = cutoff, color break if (low_color[0] == "#") or (high_color[0] == "#"): # some color scale names (such as cividis) returns: # [[loc1, "hex1"], [loc2, "hex2"], ...] low_color = hex_to_rgb(low_color) high_color = hex_to_rgb(high_color) return plotly.colors.find_intermediate_color( lowcolor=low_color, highcolor=high_color, intermed=((intermed - low_cutoff) / (high_cutoff - low_cutoff)), colortype="rgb", def get_color_default(ratio): r = 0.0 g = 0.0 b = 0.0 finalRatio = ratio; if (finalRatio < 0.0): finalRatio = 0.0 elif(finalRatio > 1.0): finalRatio = 1.0 if (finalRatio >= 0.0 and finalRatio <= 0.25): r = 0.0 g = 4.0 * finalRatio b = 1.0 elif (finalRatio > 0.25 and finalRatio <= 0.5): r = 0.0 g = 1.0 b = 1.0 - 4.0 * (finalRatio - 0.25) elif (finalRatio > 0.5 and finalRatio <= 0.75): r = 4.0*(finalRatio - 0.5); g = 1.0 b = 0.0 else: r = 1.0 g = 1.0 - 4.0 * (finalRatio - 0.75) b = 0.0 rcom = (max(min(r, 1.0), 0.0)) gcom = (max(min(g, 1.0), 0.0)) bcom = (max(min(b, 1.0), 0.0)) return [rcom,gcom,bcom] if minValue > maxValue: temp = minValue; maxValue = minValue maxValue = temp val = value val = max(min(val,maxValue), minValue) # bracket value to the min and max values if (maxValue - minValue) != 0: val = (val - minValue)/(maxValue - minValue) else: val = 0 if not colorScale or colorScale.lower() == "default": rgbList = get_color_default(val) else: rgbList = get_color(colorScale, val) if not alpha == None: rgbList.append(alpha) return rgbList @staticmethod def CSSNamedColor(color): Returns the CSS Named color that most closely matches the input color. The input color is assumed to be in the format [r, g, b]. See https://developer.mozilla.org/en-US/docs/Web/CSS/named-color Parameters ---------- color : list The input color. This is assumed to be in the format [r, g, b] Returns ------- The CSS named color that most closely matches the input color. import numbers import warnings import os import webcolors except: print("Color.CSSNamedColor - Information: Installing required webcolors library.") os.system("pip install webcolors") except: os.system("pip install webcolors --user") import webcolors print("Color.CSSNamedColor - Information: webcolors library installed correctly.") except: warnings.warn("Color.CSSNamedColor - Error: Could not import webcolors library. Please manually install webcolors. Returning None.") return None if not isinstance(color, list): print("Color.CSSNamedColor - Error: The input color parameter is not a valid list. Returning None.") return None color = [int(x) for x in color if isinstance(x, numbers.Real)] if len(color) < 3: print("Color.CSSNamedColor - Error: The input color parameter does not contain valid r, g, b values. Returning None.") return None color = color[0:3] for x in color: if not (0 <= x <= 255): print("Color.CSSNamedColor - Error: The input color parameter does not contain valid r, g, b values. Returning None.") return None def est_color(requested_color): min_colors = {} for key, name in webcolors.CSS3_HEX_TO_NAMES.items(): r_c, g_c, b_c = webcolors.hex_to_rgb(key) rd = (r_c - requested_color[0]) ** 2 gd = (g_c - requested_color[1]) ** 2 bd = (b_c - requested_color[2]) ** 2 min_colors[(rd + gd + bd)] = name return min_colors[min(min_colors.keys())] closest_color_name = webcolors.rgb_to_name(color) except ValueError: closest_color_name = est_color(color) return closest_color_name @staticmethod def CSSNamedColors(): Returns a list of all CSS named colors. See https://developer.mozilla.org/en-US/docs/Web/CSS/named-color Parameters ---------- Returns ------- The list of all CSS named colors. # List of CSS named colors css_named_colors = [ "aliceblue", "antiquewhite", "aqua", "aquamarine", "azure", "beige", "bisque", "black", "blanchedalmond", "blue", "blueviolet", "brown", "burlywood", "cadetblue", "chartreuse", "chocolate", "coral", "cornflowerblue", "cornsilk", "crimson", "cyan", "darkblue", "darkcyan", "darkgoldenrod", "darkgray", "darkgreen", "darkgrey", "darkkhaki", "darkmagenta", "darkolivegreen", "darkorange", "darkorchid", "darkred", "darksalmon", "darkseagreen", "darkslateblue", "darkslategray", "darkslategrey", "darkturquoise", "darkviolet", "deeppink", "deepskyblue", "dimgray", "dimgrey", "dodgerblue", "firebrick", "floralwhite", "forestgreen", "fuchsia", "gainsboro", "ghostwhite", "gold", "goldenrod", "gray", "green", "greenyellow", "grey", "honeydew", "hotpink", "indianred", "indigo", "ivory", "khaki", "lavender", "lavenderblush", "lawngreen", "lemonchiffon", "lightblue", "lightcoral", "lightcyan", "lightgoldenrodyellow", "lightgray", "lightgreen", "lightgrey", "lightpink", "lightsalmon", "lightseagreen", "lightskyblue", "lightslategray", "lightslategrey", "lightsteelblue", "lightyellow", "lime", "limegreen", "linen", "magenta", "maroon", "mediumaquamarine", "mediumblue", "mediumorchid", "mediumpurple", "mediumseagreen", "mediumslateblue", "mediumspringgreen", "mediumturquoise", "mediumvioletred", "midnightblue", "mintcream", "mistyrose", "moccasin", "navajowhite", "navy", "oldlace", "olive", "olivedrab", "orange", "orangered", "orchid", "palegoldenrod", "palegreen", "paleturquoise", "palevioletred", "papayawhip", "peachpuff", "peru", "pink", "plum", "powderblue", "purple", "rebeccapurple", "red", "rosybrown", "royalblue", "saddlebrown", "salmon", "sandybrown", "seagreen", "seashell", "sienna", "silver", "skyblue", "slateblue", "slategray", "slategrey", "snow", "springgreen", "steelblue", "tan", "teal", "thistle", "tomato", "turquoise", "violet", "wheat", "white", "whitesmoke", "yellow", "yellowgreen" return css_named_colors @staticmethod def PlotlyColor(color, alpha=1.0, useAlpha=False): Returns a plotly color string based on the input list of [r, g, b] or [r, g, b, a]. If your list is [r, g, b], you can optionally specify an alpha value Parameters ---------- color : list The input color list. This is assumed to be in the format [r, g, b] or [r, g, b, a] alpha : float , optional The transparency value. 0.0 means the color is fully transparent, 1.0 means the color is fully opaque. The default is 1.0. useAlpha : bool , optional If set to True, the returns list includes the alpha value as a fourth element in the list. Returns ------- The plotly color string. if not isinstance(color, list): print("Color.PlotlyColor - Error: The input color parameter is not a valid list. Returning None.") return None if len(color) < 3: print("Color.PlotlyColor - Error: The input color parameter contains less than the minimum three elements. Returning None.") return None if len(color) == 4: alpha = color[3] alpha = min(max(alpha, 0), 1) if alpha < 1: useAlpha = True if useAlpha: return "rgba("+str(color[0])+","+str(color[1])+","+str(color[2])+","+str(alpha)+")" return "rgb("+str(color[0])+","+str(color[1])+","+str(color[2])+")" @staticmethod def RGBToHex(rgb): Converts RGB color values to a hexadecimal color string. Parameters ---------- rgb : tuple A tuple containing three integers representing the RGB values. Returns ------- A hexadecimal color string in the format '#RRGGBB'. if not isinstance(rgb, list): print("Color.RGBToHex - Error: The input rgb parameter is not a valid list. Returning None.") return None r, g, b = rgb hex_value = "#{:02x}{:02x}{:02x}".format(r, g, b) return hex_value.upper() def ByCSSNamedColor(color, alpha: float = None): Creates a Color from a CSS named color string. See https://developer.mozilla.org/en-US/docs/Web/CSS/named-color Parameters ---------- color : str A CSS named color. alpha : float , optional THe desired alpha (transparency value). The default is None which means no alpha value will be included in the returned list. Returns ------- The color expressed as an [r, g, b] or an [r, g, b, a] list. import warnings import os import webcolors except: print("Color.ByCSSNamedColor - Information: Installing required webcolors library.") os.system("pip install webcolors") except: os.system("pip install webcolors --user") import webcolors print("Color.ByCSSNamedColor - Information: webcolors library installed correctly.") except: warnings.warn("Color.ByCSSNamedColor - Error: Could not import webcolors library. Please manually install webcolors. Returning None.") return None if not alpha == None: if not 0.0 <= alpha <= 1.0: print("Color.ByCSSNamedColor - Error: alpha is not within the valid range of 0 to 1. Returning None.") return None # Get RGB values from the named CSS color rgbList = list(webcolors.name_to_rgb(color)) if not alpha == None: rgbList.append(alpha) return rgbList except ValueError: print(f"Color.ByCSSNamedColor - Error: '{color}' is not a valid named CSS color. Returning None.") return None @staticmethod def ByHEX(hex: str, alpha: float = None): Converts a hexadecimal color string to RGB color values. Parameters ---------- hex : str A hexadecimal color string in the format '#RRGGBB'. alpha : float , optional The transparency value. 0.0 means the color is fully transparent, 1.0 means the color is fully opaque. The default is None which means no transparency value will be included in the returned color. Returns ------- The color expressed as an [r, g, b] or an [r, g, b, a] list. if not isinstance(hex, str): print("Color.HEXtoRGB - Error: The input hex parameter is not a valid string. Returning None.") return None if not alpha == None: if not 0.0 <= alpha <= 1.0: print("Color.ByHEX - Error: alpha is not within the valid range of 0 to 1. Returning None.") return None hex = hex.lstrip('#') if len(hex) != 6: print("Color.HEXtoRGB - Error: Invalid hexadecimal color format. It should be a 6-digit hex value. Returning None.") return None r = int(hex[0:2], 16) g = int(hex[2:4], 16) b = int(hex[4:6], 16) rgbList = [r, g, b] if not alpha == None: rgbList.append(alpha) return rgbList @staticmethod def ByValueInRange(value: float = 0.5, minValue: float = 0.0, maxValue: float = 1.0, alpha: float = None, colorScale="viridis"): Returns the r, g, b, (and optionally) a list of numbers representing the red, green, blue and alpha color elements. Parameters ---------- value : float , optional The input value. The default is 0.5. minValue : float , optional the input minimum value. The default is 0.0. maxValue : float , optional The input maximum value. The default is 1.0. alpha : float , optional The alpha (transparency) value. 0.0 means the color is fully transparent, 1.0 means the color is fully opaque. The default is 1.0. useAlpha : bool , optional If set to True, the returns list includes the alpha value as a fourth element in the list. colorScale : str , optional The desired type of plotly color scales to use (e.g. "Viridis", "Plasma"). The default is "Viridis". For a full list of names, see https://plotly.com/python/builtin-colorscales/. Returns ------- The color expressed as an [r, g, b] or an [r, g, b, a] list. if not alpha == None: if not 0.0 <= alpha <= 1.0: print("Color.ByValueInRange - Error: alpha is not within the valid range of 0 to 1. Returning None.") return None # Code based on: https://stackoverflow.com/questions/62710057/access-color-from-plotly-color-scale def hex_to_rgb(value): value = str(value) value = value.lstrip('#') lv = len(value) returnValue = tuple(int(value[i:i + lv // 3], 16) for i in range(0, lv, lv // 3)) return str(returnValue) def get_color(colorscale_name, loc): from _plotly_utils.basevalidators import ColorscaleValidator # first parameter: Name of the property being validated # second parameter: a string, doesn't really matter in our use case cv = ColorscaleValidator("colorscale", "") # colorscale will be a list of lists: [[loc1, "rgb1"], [loc2, "rgb2"], ...] colorscale = cv.validate_coerce(colorscale_name) if hasattr(loc, "__iter__"): return [get_continuous_color(colorscale, x) for x in loc] color = get_continuous_color(colorscale, loc) color = color.replace("rgb", "") color = color.replace("(", "") color = color.replace(")", "") color = color.split(",") final_colors = [] for c in color: final_colors.append(math.floor(float(c))) return final_colors def get_continuous_color(colorscale, intermed): Plotly continuous colorscales assign colors to the range [0, 1]. This function computes the intermediate color for any value in that range. Plotly doesn't make the colorscales directly accessible in a common format. Some are ready to use: colorscale = plotly.colors.PLOTLY_SCALES["Greens"] Others are just swatches that need to be constructed into a colorscale: viridis_colors, scale = plotly.colors.convert_colors_to_same_type(plotly.colors.sequential.Viridis) colorscale = plotly.colors.make_colorscale(viridis_colors, scale=scale) :param colorscale: A plotly continuous colorscale defined with RGB string colors. :param intermed: value in the range [0, 1] :return: color in rgb string format :rtype: str if len(colorscale) < 1: raise ValueError("colorscale must have at least one color") if intermed <= 0 or len(colorscale) == 1: c = colorscale[0][1] return c if c[0] != "#" else hex_to_rgb(c) if intermed >= 1: c = colorscale[-1][1] return c if c[0] != "#" else hex_to_rgb(c) for cutoff, color in colorscale: if intermed > cutoff: low_cutoff, low_color = cutoff, color else: high_cutoff, high_color = cutoff, color break if (low_color[0] == "#") or (high_color[0] == "#"): # some color scale names (such as cividis) returns: # [[loc1, "hex1"], [loc2, "hex2"], ...] low_color = hex_to_rgb(low_color) high_color = hex_to_rgb(high_color) return plotly.colors.find_intermediate_color( lowcolor=low_color, highcolor=high_color, intermed=((intermed - low_cutoff) / (high_cutoff - low_cutoff)), colortype="rgb", def get_color_default(ratio): r = 0.0 g = 0.0 b = 0.0 finalRatio = ratio; if (finalRatio < 0.0): finalRatio = 0.0 elif(finalRatio > 1.0): finalRatio = 1.0 if (finalRatio >= 0.0 and finalRatio <= 0.25): r = 0.0 g = 4.0 * finalRatio b = 1.0 elif (finalRatio > 0.25 and finalRatio <= 0.5): r = 0.0 g = 1.0 b = 1.0 - 4.0 * (finalRatio - 0.25) elif (finalRatio > 0.5 and finalRatio <= 0.75): r = 4.0*(finalRatio - 0.5); g = 1.0 b = 0.0 else: r = 1.0 g = 1.0 - 4.0 * (finalRatio - 0.75) b = 0.0 rcom = (max(min(r, 1.0), 0.0)) gcom = (max(min(g, 1.0), 0.0)) bcom = (max(min(b, 1.0), 0.0)) return [rcom,gcom,bcom] if minValue > maxValue: temp = minValue; maxValue = minValue maxValue = temp val = value val = max(min(val,maxValue), minValue) # bracket value to the min and max values if (maxValue - minValue) != 0: val = (val - minValue)/(maxValue - minValue) else: val = 0 if not colorScale or colorScale.lower() == "default": rgbList = get_color_default(val) else: rgbList = get_color(colorScale, val) if not alpha == None: rgbList.append(alpha) return rgbList @staticmethod def CSSNamedColor(color): Returns the CSS Named color that most closely matches the input color. The input color is assumed to be in the format [r, g, b]. See https://developer.mozilla.org/en-US/docs/Web/CSS/named-color Parameters ---------- color : list The input color. This is assumed to be in the format [r, g, b] Returns ------- The CSS named color that most closely matches the input color. import numbers import warnings import os import webcolors except: print("Color.CSSNamedColor - Information: Installing required webcolors library.") os.system("pip install webcolors") except: os.system("pip install webcolors --user") import webcolors print("Color.CSSNamedColor - Information: webcolors library installed correctly.") except: warnings.warn("Color.CSSNamedColor - Error: Could not import webcolors library. Please manually install webcolors. Returning None.") return None if not isinstance(color, list): print("Color.CSSNamedColor - Error: The input color parameter is not a valid list. Returning None.") return None color = [int(x) for x in color if isinstance(x, numbers.Real)] if len(color) < 3: print("Color.CSSNamedColor - Error: The input color parameter does not contain valid r, g, b values. Returning None.") return None color = color[0:3] for x in color: if not (0 <= x <= 255): print("Color.CSSNamedColor - Error: The input color parameter does not contain valid r, g, b values. Returning None.") return None def est_color(requested_color): min_colors = {} for key, name in webcolors.CSS3_HEX_TO_NAMES.items(): r_c, g_c, b_c = webcolors.hex_to_rgb(key) rd = (r_c - requested_color[0]) ** 2 gd = (g_c - requested_color[1]) ** 2 bd = (b_c - requested_color[2]) ** 2 min_colors[(rd + gd + bd)] = name return min_colors[min(min_colors.keys())] closest_color_name = webcolors.rgb_to_name(color) except ValueError: closest_color_name = est_color(color) return closest_color_name @staticmethod def CSSNamedColors(): Returns a list of all CSS named colors. See https://developer.mozilla.org/en-US/docs/Web/CSS/named-color Parameters ---------- Returns ------- The list of all CSS named colors. # List of CSS named colors css_named_colors = [ "aliceblue", "antiquewhite", "aqua", "aquamarine", "azure", "beige", "bisque", "black", "blanchedalmond", "blue", "blueviolet", "brown", "burlywood", "cadetblue", "chartreuse", "chocolate", "coral", "cornflowerblue", "cornsilk", "crimson", "cyan", "darkblue", "darkcyan", "darkgoldenrod", "darkgray", "darkgreen", "darkgrey", "darkkhaki", "darkmagenta", "darkolivegreen", "darkorange", "darkorchid", "darkred", "darksalmon", "darkseagreen", "darkslateblue", "darkslategray", "darkslategrey", "darkturquoise", "darkviolet", "deeppink", "deepskyblue", "dimgray", "dimgrey", "dodgerblue", "firebrick", "floralwhite", "forestgreen", "fuchsia", "gainsboro", "ghostwhite", "gold", "goldenrod", "gray", "green", "greenyellow", "grey", "honeydew", "hotpink", "indianred", "indigo", "ivory", "khaki", "lavender", "lavenderblush", "lawngreen", "lemonchiffon", "lightblue", "lightcoral", "lightcyan", "lightgoldenrodyellow", "lightgray", "lightgreen", "lightgrey", "lightpink", "lightsalmon", "lightseagreen", "lightskyblue", "lightslategray", "lightslategrey", "lightsteelblue", "lightyellow", "lime", "limegreen", "linen", "magenta", "maroon", "mediumaquamarine", "mediumblue", "mediumorchid", "mediumpurple", "mediumseagreen", "mediumslateblue", "mediumspringgreen", "mediumturquoise", "mediumvioletred", "midnightblue", "mintcream", "mistyrose", "moccasin", "navajowhite", "navy", "oldlace", "olive", "olivedrab", "orange", "orangered", "orchid", "palegoldenrod", "palegreen", "paleturquoise", "palevioletred", "papayawhip", "peachpuff", "peru", "pink", "plum", "powderblue", "purple", "rebeccapurple", "red", "rosybrown", "royalblue", "saddlebrown", "salmon", "sandybrown", "seagreen", "seashell", "sienna", "silver", "skyblue", "slateblue", "slategray", "slategrey", "snow", "springgreen", "steelblue", "tan", "teal", "thistle", "tomato", "turquoise", "violet", "wheat", "white", "whitesmoke", "yellow", "yellowgreen" return css_named_colors @staticmethod def PlotlyColor(color, alpha=1.0, useAlpha=False): Returns a plotly color string based on the input list of [r, g, b] or [r, g, b, a]. If your list is [r, g, b], you can optionally specify an alpha value Parameters ---------- color : list The input color list. This is assumed to be in the format [r, g, b] or [r, g, b, a] alpha : float , optional The transparency value. 0.0 means the color is fully transparent, 1.0 means the color is fully opaque. The default is 1.0. useAlpha : bool , optional If set to True, the returns list includes the alpha value as a fourth element in the list. Returns ------- The plotly color string. if not isinstance(color, list): print("Color.PlotlyColor - Error: The input color parameter is not a valid list. Returning None.") return None if len(color) < 3: print("Color.PlotlyColor - Error: The input color parameter contains less than the minimum three elements. Returning None.") return None if len(color) == 4: alpha = color[3] alpha = min(max(alpha, 0), 1) if alpha < 1: useAlpha = True if useAlpha: return "rgba("+str(color[0])+","+str(color[1])+","+str(color[2])+","+str(alpha)+")" return "rgb("+str(color[0])+","+str(color[1])+","+str(color[2])+")" @staticmethod def RGBToHex(rgb): Converts RGB color values to a hexadecimal color string. Parameters ---------- rgb : tuple A tuple containing three integers representing the RGB values. Returns ------- A hexadecimal color string in the format '#RRGGBB'. if not isinstance(rgb, list): print("Color.RGBToHex - Error: The input rgb parameter is not a valid list. Returning None.") return None r, g, b = rgb hex_value = "#{:02x}{:02x}{:02x}".format(r, g, b) return hex_value.upper()

Static methods

def ByCSSNamedColor ( color, alpha: float = None)

Creates a Color from a CSS named color string. See https://developer.mozilla.org/en-US/docs/Web/CSS/named-color

Parameters

color : str
A CSS named color.
alpha : float , optional
THe desired alpha (transparency value). The default is None which means no alpha value will be included in the returned list.

Returns

The color expressed as an [r, g, b] or an [r, g, b, a] list.
Expand source code 
@staticmethod
def ByCSSNamedColor(color, alpha: float = None):
    Creates a Color from a CSS named color string. See https://developer.mozilla.org/en-US/docs/Web/CSS/named-color
    Parameters
    ----------
    color : str
        A CSS named color.
    alpha : float , optional
        THe desired alpha (transparency value). The default is None which means no alpha value will be included in the returned list.
    Returns
    -------
        The color expressed as an [r, g, b] or an [r, g, b, a] list.
    import warnings
    import os
        import webcolors
    except:
        print("Color.ByCSSNamedColor - Information: Installing required webcolors library.")
            os.system("pip install webcolors")
        except:
            os.system("pip install webcolors --user")
            import webcolors
            print("Color.ByCSSNamedColor - Information: webcolors library installed correctly.")
        except:
            warnings.warn("Color.ByCSSNamedColor - Error: Could not import webcolors library. Please manually install webcolors. Returning None.")
            return None
    if not alpha == None:
        if not 0.0 <= alpha <= 1.0:
            print("Color.ByCSSNamedColor - Error: alpha is not within the valid range of 0 to 1. Returning None.")
            return None
        # Get RGB values from the named CSS color
        rgbList = list(webcolors.name_to_rgb(color))
        if not alpha == None:
            rgbList.append(alpha)
        return rgbList
    except ValueError:
        print(f"Color.ByCSSNamedColor - Error: '{color}' is not a valid named CSS color. Returning None.")
        return None
def ByHEX ( hex: str, alpha: float = None)

Converts a hexadecimal color string to RGB color values.

Parameters

hex : str
A hexadecimal color string in the format '#RRGGBB'.
alpha : float , optional
The transparency value. 0.0 means the color is fully transparent, 1.0 means the color is fully opaque. The default is None which means no transparency value will be included in the returned color.

Returns

The color expressed as an [r, g, b] or an [r, g, b, a] list.
Expand source code 
@staticmethod
def ByHEX(hex: str, alpha: float = None):
    Converts a hexadecimal color string to RGB color values.
    Parameters
    ----------
    hex : str
        A hexadecimal color string in the format '#RRGGBB'.
    alpha : float , optional
        The transparency value. 0.0 means the color is fully transparent, 1.0 means the color is fully opaque. The default is None
        which means no transparency value will be included in the returned color.
    Returns
    -------
        The color expressed as an [r, g, b] or an [r, g, b, a] list.
    if not isinstance(hex, str):
        print("Color.HEXtoRGB - Error: The input hex parameter is not a valid string. Returning None.")
        return None
    if not alpha == None:
        if not 0.0 <= alpha <= 1.0:
            print("Color.ByHEX - Error: alpha is not within the valid range of 0 to 1. Returning None.")
            return None
    hex = hex.lstrip('#')
    if len(hex) != 6:
        print("Color.HEXtoRGB - Error: Invalid hexadecimal color format. It should be a 6-digit hex value. Returning None.")
        return None
    r = int(hex[0:2], 16)
    g = int(hex[2:4], 16)
    b = int(hex[4:6], 16)
    rgbList = [r, g, b]
    if not alpha == None:
        rgbList.append(alpha)
    return rgbList
def ByValueInRange ( value: float = 0.5, minValue: float = 0.0, maxValue: float = 1.0, alpha: float = None, colorScale='viridis')

Returns the r, g, b, (and optionally) a list of numbers representing the red, green, blue and alpha color elements.

Parameters

value : float , optional
The input value. The default is 0.5.
minValue : float , optional
the input minimum value. The default is 0.0.
maxValue : float , optional
The input maximum value. The default is 1.0.
alpha : float , optional
The alpha (transparency) value. 0.0 means the color is fully transparent, 1.0 means the color is fully opaque. The default is 1.0.
useAlpha : bool , optional
If set to True, the returns list includes the alpha value as a fourth element in the list.
colorScale : str , optional
The desired type of plotly color scales to use (e.g. "Viridis", "Plasma"). The default is "Viridis". For a full list of names, see https://plotly.com/python/builtin-colorscales/.

Returns

The color expressed as an [r, g, b] or an [r, g, b, a] list.
Expand source code 
@staticmethod
def ByValueInRange(value: float = 0.5, minValue: float = 0.0, maxValue: float = 1.0, alpha: float = None, colorScale="viridis"):
    Returns the r, g, b, (and optionally) a list of numbers representing the red, green, blue and alpha color elements.
    Parameters
    ----------
    value : float , optional
        The input value. The default is 0.5.
    minValue : float , optional
        the input minimum value. The default is 0.0.
    maxValue : float , optional
        The input maximum value. The default is 1.0.
    alpha : float , optional
        The alpha (transparency) value. 0.0 means the color is fully transparent, 1.0 means the color is fully opaque. The default is 1.0.
    useAlpha : bool , optional
        If set to True, the returns list includes the alpha value as a fourth element in the list.
    colorScale : str , optional
        The desired type of plotly color scales to use (e.g. "Viridis", "Plasma"). The default is "Viridis". For a full list of names, see https://plotly.com/python/builtin-colorscales/.
    Returns
    -------
        The color expressed as an [r, g, b] or an [r, g, b, a] list.
    if not alpha == None:
        if not 0.0 <= alpha <= 1.0:
            print("Color.ByValueInRange - Error: alpha is not within the valid range of 0 to 1. Returning None.")
            return None
    # Code based on: https://stackoverflow.com/questions/62710057/access-color-from-plotly-color-scale
    def hex_to_rgb(value):
        value = str(value)
        value = value.lstrip('#')
        lv = len(value)
        returnValue = tuple(int(value[i:i + lv // 3], 16) for i in range(0, lv, lv // 3))
        return str(returnValue)
    def get_color(colorscale_name, loc):
        from _plotly_utils.basevalidators import ColorscaleValidator
        # first parameter: Name of the property being validated
        # second parameter: a string, doesn't really matter in our use case
        cv = ColorscaleValidator("colorscale", "")
        # colorscale will be a list of lists: [[loc1, "rgb1"], [loc2, "rgb2"], ...] 
        colorscale = cv.validate_coerce(colorscale_name)
        if hasattr(loc, "__iter__"):
            return [get_continuous_color(colorscale, x) for x in loc]
        color = get_continuous_color(colorscale, loc)
        color = color.replace("rgb", "")
        color = color.replace("(", "")
        color = color.replace(")", "")
        color = color.split(",")
        final_colors = []
        for c in color:
            final_colors.append(math.floor(float(c)))
        return final_colors
    def get_continuous_color(colorscale, intermed):
        Plotly continuous colorscales assign colors to the range [0, 1]. This function computes the intermediate
        color for any value in that range.
        Plotly doesn't make the colorscales directly accessible in a common format.
        Some are ready to use:
            colorscale = plotly.colors.PLOTLY_SCALES["Greens"]
        Others are just swatches that need to be constructed into a colorscale:
            viridis_colors, scale = plotly.colors.convert_colors_to_same_type(plotly.colors.sequential.Viridis)
            colorscale = plotly.colors.make_colorscale(viridis_colors, scale=scale)
        :param colorscale: A plotly continuous colorscale defined with RGB string colors.
        :param intermed: value in the range [0, 1]
        :return: color in rgb string format
        :rtype: str
        if len(colorscale) < 1:
            raise ValueError("colorscale must have at least one color")
        if intermed <= 0 or len(colorscale) == 1:
            c = colorscale[0][1]
            return c if c[0] != "#" else hex_to_rgb(c)
        if intermed >= 1:
            c = colorscale[-1][1]
            return c if c[0] != "#" else hex_to_rgb(c)
        for cutoff, color in colorscale:
            if intermed > cutoff:
                low_cutoff, low_color = cutoff, color
            else:
                high_cutoff, high_color = cutoff, color
                break
        if (low_color[0] == "#") or (high_color[0] == "#"):
            # some color scale names (such as cividis) returns:
            # [[loc1, "hex1"], [loc2, "hex2"], ...]
            low_color = hex_to_rgb(low_color)
            high_color = hex_to_rgb(high_color)
        return plotly.colors.find_intermediate_color(
            lowcolor=low_color,
            highcolor=high_color,
            intermed=((intermed - low_cutoff) / (high_cutoff - low_cutoff)),
            colortype="rgb",
    def get_color_default(ratio):
        r = 0.0
        g = 0.0
        b = 0.0
        finalRatio = ratio;
        if (finalRatio < 0.0):
            finalRatio = 0.0
        elif(finalRatio > 1.0):
            finalRatio = 1.0
        if (finalRatio >= 0.0 and finalRatio <= 0.25):
            r = 0.0
            g = 4.0 * finalRatio
            b = 1.0
        elif (finalRatio > 0.25 and finalRatio <= 0.5):
            r = 0.0
            g = 1.0
            b = 1.0 - 4.0 * (finalRatio - 0.25)
        elif (finalRatio > 0.5 and finalRatio <= 0.75):
            r = 4.0*(finalRatio - 0.5);
            g = 1.0
            b = 0.0
        else:
            r = 1.0
            g = 1.0 - 4.0 * (finalRatio - 0.75)
            b = 0.0
        rcom =  (max(min(r, 1.0), 0.0))
        gcom =  (max(min(g, 1.0), 0.0))
        bcom =  (max(min(b, 1.0), 0.0))
        return [rcom,gcom,bcom]
    if minValue > maxValue:
        temp = minValue;
        maxValue = minValue
        maxValue = temp
    val = value
    val = max(min(val,maxValue), minValue) # bracket value to the min and max values
    if (maxValue - minValue) != 0:
        val = (val - minValue)/(maxValue - minValue)
    else:
        val = 0
    if not colorScale or colorScale.lower() == "default":
        rgbList = get_color_default(val)
    else:
        rgbList = get_color(colorScale, val)
    if not alpha == None:
        rgbList.append(alpha)
    return rgbList
def CSSNamedColor ( color)

Returns the CSS Named color that most closely matches the input color. The input color is assumed to be in the format [r, g, b]. See https://developer.mozilla.org/en-US/docs/Web/CSS/named-color

Parameters

color : list
The input color. This is assumed to be in the format [r, g, b]

Returns

The CSS named color that most closely matches the input color.
Expand source code 
@staticmethod
def CSSNamedColor(color):
    Returns the CSS Named color that most closely matches the input color. The input color is assumed to be
    in the format [r, g, b]. See https://developer.mozilla.org/en-US/docs/Web/CSS/named-color
    Parameters
    ----------
    color : list
        The input color. This is assumed to be in the format [r, g, b]
    Returns
    -------
        The CSS named color that most closely matches the input color.
    import numbers
    import warnings
    import os
        import webcolors
    except:
        print("Color.CSSNamedColor - Information: Installing required webcolors library.")
            os.system("pip install webcolors")
        except:
            os.system("pip install webcolors --user")
            import webcolors
            print("Color.CSSNamedColor - Information: webcolors library installed correctly.")
        except:
            warnings.warn("Color.CSSNamedColor - Error: Could not import webcolors library. Please manually install webcolors. Returning None.")
            return None
    if not isinstance(color, list):
        print("Color.CSSNamedColor - Error: The input color parameter is not a valid list. Returning None.")
        return None
    color = [int(x) for x in color if isinstance(x, numbers.Real)]
    if len(color) < 3:
        print("Color.CSSNamedColor - Error: The input color parameter does not contain valid r, g, b values. Returning None.")
        return None
    color = color[0:3]
    for x in color:
        if not (0 <= x <= 255):
            print("Color.CSSNamedColor - Error: The input color parameter does not contain valid r, g, b values. Returning None.")
            return None
    def est_color(requested_color):
        min_colors = {}
        for key, name in webcolors.CSS3_HEX_TO_NAMES.items():
            r_c, g_c, b_c = webcolors.hex_to_rgb(key)
            rd = (r_c - requested_color[0]) ** 2
            gd = (g_c - requested_color[1]) ** 2
            bd = (b_c - requested_color[2]) ** 2
            min_colors[(rd + gd + bd)] = name
        return min_colors[min(min_colors.keys())]
        closest_color_name = webcolors.rgb_to_name(color)
    except ValueError:
        closest_color_name = est_color(color)
    return closest_color_name
def CSSNamedColors ( )

Returns a list of all CSS named colors. See https://developer.mozilla.org/en-US/docs/Web/CSS/named-color

Parameters

Returns

The list of all CSS named colors.
Expand source code 
@staticmethod
def CSSNamedColors():
    Returns a list of all CSS named colors. See https://developer.mozilla.org/en-US/docs/Web/CSS/named-color
    Parameters
    ----------
    Returns
    -------
        The list of all CSS named colors.
    # List of CSS named colors
    css_named_colors = [
        "aliceblue", "antiquewhite", "aqua", "aquamarine", "azure", "beige", "bisque", "black", "blanchedalmond",
        "blue", "blueviolet", "brown", "burlywood", "cadetblue", "chartreuse", "chocolate", "coral", "cornflowerblue",
        "cornsilk", "crimson", "cyan", "darkblue", "darkcyan", "darkgoldenrod", "darkgray", "darkgreen", "darkgrey",
        "darkkhaki", "darkmagenta", "darkolivegreen", "darkorange", "darkorchid", "darkred", "darksalmon",
        "darkseagreen", "darkslateblue", "darkslategray", "darkslategrey", "darkturquoise", "darkviolet", "deeppink",
        "deepskyblue", "dimgray", "dimgrey", "dodgerblue", "firebrick", "floralwhite", "forestgreen", "fuchsia",
        "gainsboro", "ghostwhite", "gold", "goldenrod", "gray", "green", "greenyellow", "grey", "honeydew", "hotpink",
        "indianred", "indigo", "ivory", "khaki", "lavender", "lavenderblush", "lawngreen", "lemonchiffon", "lightblue",
        "lightcoral", "lightcyan", "lightgoldenrodyellow", "lightgray", "lightgreen", "lightgrey", "lightpink",
        "lightsalmon", "lightseagreen", "lightskyblue", "lightslategray", "lightslategrey", "lightsteelblue",
        "lightyellow", "lime", "limegreen", "linen", "magenta", "maroon", "mediumaquamarine", "mediumblue",
        "mediumorchid", "mediumpurple", "mediumseagreen", "mediumslateblue", "mediumspringgreen", "mediumturquoise",
        "mediumvioletred", "midnightblue", "mintcream", "mistyrose", "moccasin", "navajowhite", "navy", "oldlace",
        "olive", "olivedrab", "orange", "orangered", "orchid", "palegoldenrod", "palegreen", "paleturquoise",
        "palevioletred", "papayawhip", "peachpuff", "peru", "pink", "plum", "powderblue", "purple", "rebeccapurple",
        "red", "rosybrown", "royalblue", "saddlebrown", "salmon", "sandybrown", "seagreen", "seashell", "sienna",
        "silver", "skyblue", "slateblue", "slategray", "slategrey", "snow", "springgreen", "steelblue", "tan",
        "teal", "thistle", "tomato", "turquoise", "violet", "wheat", "white", "whitesmoke", "yellow", "yellowgreen"
    return css_named_colors
def PlotlyColor ( color, alpha=1.0, useAlpha=False)

Returns a plotly color string based on the input list of [r, g, b] or [r, g, b, a]. If your list is [r, g, b], you can optionally specify an alpha value

Parameters

color : list
The input color list. This is assumed to be in the format [r, g, b] or [r, g, b, a]
alpha : float , optional
The transparency value. 0.0 means the color is fully transparent, 1.0 means the color is fully opaque. The default is 1.0.
useAlpha : bool , optional
If set to True, the returns list includes the alpha value as a fourth element in the list.

Returns

The plotly color string.
Expand source code 
@staticmethod
def PlotlyColor(color, alpha=1.0, useAlpha=False):
    Returns a plotly color string based on the input list of [r, g, b] or [r, g, b, a]. If your list is [r, g, b], you can optionally specify an alpha value
    Parameters
    ----------
    color : list
        The input color list. This is assumed to be in the format [r, g, b] or [r, g, b, a]
    alpha : float , optional
        The transparency value. 0.0 means the color is fully transparent, 1.0 means the color is fully opaque. The default is 1.0.
    useAlpha : bool , optional
        If set to True, the returns list includes the alpha value as a fourth element in the list.
    Returns
    -------
        The plotly color string.
    if not isinstance(color, list):
        print("Color.PlotlyColor - Error: The input color parameter is not a valid list. Returning None.")
        return None
    if len(color) < 3:
        print("Color.PlotlyColor - Error: The input color parameter contains less than the minimum three elements. Returning None.")
        return None
    if len(color) == 4:
        alpha = color[3]
    alpha = min(max(alpha, 0), 1)
    if alpha < 1:
        useAlpha = True
    if useAlpha:
        return "rgba("+str(color[0])+","+str(color[1])+","+str(color[2])+","+str(alpha)+")"
    return "rgb("+str(color[0])+","+str(color[1])+","+str(color[2])+")"
def RGBToHex ( rgb)

Converts RGB color values to a hexadecimal color string.

Parameters

rgb : tuple
A tuple containing three integers representing the RGB values.

Returns

A hexadecimal color string in the format '#RRGGBB'.
Expand source code 
@staticmethod
def RGBToHex(rgb):
    Converts RGB color values to a hexadecimal color string.
    Parameters
    ----------
    rgb : tuple
        A tuple containing three integers representing the RGB values.
    Returns
    -------
        A hexadecimal color string in the format '#RRGGBB'.
    if not isinstance(rgb, list):
        print("Color.RGBToHex - Error: The input rgb parameter is not a valid list. Returning None.")
        return None
    r, g, b = rgb
    hex_value = "#{:02x}{:02x}{:02x}".format(r, g, b)
    return hex_value.upper()
 
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