2. ImageColor getcolor

See: https://pillow.readthedocs.io/en/stable/reference/ImageColor.html#PIL.ImageColor.getcolor

2.1. getcolor

The function, ImageColor.getcolor(color, mode), takes a color string and returns a greyscale value.

ImageColor.getcolor(color, mode): color is a color which may include standard html color names strings and hex colour strings.

mode is “L” for greyscale.

e.g. “red”, (255, 0, 0) returns 76

2.2. Examples

The function, get_rgb_colors, passes in a list of colours and returns a list of rgb tuples.

The function, get_color_colors, passes in a list of colours and returns a list of greyscale values.

from PIL import Image, ImageColor

def get_color_colors(colors):
    colors_g = [ImageColor.getcolor(color, mode="L") for color in colors]
    return colors_g

colors = ["red", "green", "blue", "yellow"]
print(get_color_colors(colors))
# [76, 75, 29, 226]

colors = ["rgb(255, 0, 0)", "rgb(0, 128, 0)"]
print(get_color_colors(colors))
# [76, 75]

colors = ["rgb(100%, 0%, 0%)", "rgb(0%, 50%, 0%)"]
print(get_color_colors(colors))
# [76, 75]

colors = ["#ff00ff", "#00ffff", "#ffff00"]
print(get_color_colors(colors))
# [105, 179, 226]

colors = ["hsv(120,100%,100%)", "hsv(120,100%,50%)", "hsv(120,50%,100%)"]
print(get_color_colors(colors))
# [150, 75, 203]

# with transparency
colors = ["#ff0000ff", "#ff0000cc", "#ff000080"]
print(get_color_colors(colors))
# [76, 76, 76]