def color_variant(hex_color, brightness_offset=1): """ takes a color like #87c95f and produces a lighter or darker variant """ if len(hex_color) != 7: raise Exception("Passed %s into color_variant(), needs to be in #87c95f format." % hex_color) rgb_hex = [hex_color[x:x+2] for x in [1, 3, 5]] new_rgb_int = [int(hex_value, 16) + brightness_offset for hex_value in rgb_hex] new_rgb_int = [min([255, max([0, i])]) for i in new_rgb_int] # make sure new values are between 0 and 255 # hex() produces "0x88", we want just "88" return "#" + "".join([hex(i)[2:] for i in new_rgb_int]) color_variant('#ffffff')
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