Question

How to convert CMYK to RGB in PHP

Answer 1

// CMYK = Cyan, Magenta, Yellow, Key(black)
// RGB = Red, Green, Blue
 
function cmykToRgb($c, $m, $y, $k) {
    $r = round(255 * (1 - $c / 100.0) * (1 - $k / 100.0));
    $g = round(255 * (1 - $m / 100.0) * (1 - $k / 100.0));
    $b = round(255 * (1 - $y / 100.0) * (1 - $k / 100.0));
         
    return array($r, $g, $b);
}
         
$rgb = cmykToRgb(2.0, 17.0, 100.0, 0.0);
 
echo json_encode($rgb);
 

 
/*
run:
 
[250,212,0]
 
*/

 

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