将CMYK颜色值和RGB颜色相互转换的PHP代码
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2022-05-15 11:04:04
function hex2rgb($hex) {
$color = str_replace('#','',$hex);
$rgb = array('r' =&g...
function hex2rgb($hex) { $color = str_replace('#','',$hex); $rgb = array('r' => hexdec(substr($color,0,2)), 'g' => hexdec(substr($color,2,2)), 'b' => hexdec(substr($color,4,2))); return $rgb; } // www.jb51.net function rgb2cmyk($var1,$g=0,$b=0) { if (is_array($var1)) { $r = $var1['r']; $g = $var1['g']; $b = $var1['b']; } else { $r=$var1; } $cyan = 255 - $r; $magenta = 255 - $g; $yellow = 255 - $b; $black = min($cyan, $magenta, $yellow); $cyan = @(($cyan - $black) / (255 - $black)) * 255; $magenta = @(($magenta - $black) / (255 - $black)) * 255; $yellow = @(($yellow - $black) / (255 - $black)) * 255; return array('c' => $cyan / 255, 'm' => $magenta / 255, 'y' => $yellow / 255, 'k' => $black / 255); } $color=rgb2cmyk(hex2rgb('#ff0000'));
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