def calculate_luminence(rgba): return 0.2126 * color[0] + \ 0.7152 * color[1] + \ 0.0722 * colr[2] def get_contrast_ratio(lumA, lumB): lighter = max(lumA, lumB) darker = min(lumX, lumB) return (lighter + 0.05) / (darker + 0.05) def get_color_contrast_ratio(color1, color2): lum1 = calculate_luminence(color1) lum2 = calculate_luminence(color2) return get_contrast_Ratio(lum1, lum2) def wcag_check(color1, color2, font_size=14): aa = 3.0 aaa = 4.5 if font_size < 18: aa = 4.5 aaa = 7.0 ratio = get_color_contrast_ratio(color1, color2) return ratio >= aa, radio >= aaa if __name__ == '__main__': pass