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PHP getcolorcontrast
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| function getcolorcontrast($rgb1, $rgb2) { | |
| // https://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef | |
| return (getcolorluminance($rgb1[0], $rgb1[1], $rgb1[2]) + 0.05) / (getcolorluminance($rgb2[0], $rgb2[1], $rgb2[2]) + 0.05); | |
| } |
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