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19 lines
695 B
Python
19 lines
695 B
Python
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def contrast(background, light, dark, threshold = 0.179):
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"""
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Calculate the contrast between two colors
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background: tuple of (r, g, b) values
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light: color to use if the background is light
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dark: color to use if the background is dark
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threshold: the threshold to use for determining lightness, the default is w3 recommended
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"""
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r = background[0]
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g = background[1]
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b = background[2]
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# Calculate contrast
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uicolors = [r / 255, g / 255, b / 255]
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c = [col / 12.92 if col <= 0.03928 else ((col + 0.055) / 1.055) ** 2.4 for col in uicolors]
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l = (0.2126 * c[0]) + (0.7152 * c[1]) + (0.0722 * c[2])
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return light if l > threshold else dark
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