Reply To: Convert hexadecimal value to CMYK

• mikemikelle07

• June 25, 2020 at 4:31 am

in function.php :

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;
 }
 
 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));
	$magenta = @(($magenta - $black) / (255 - $black));
	$yellow = @(($yellow  - $black) / (255 - $black));
	return array(
	   'c' => $cyan,
	   'm' => $magenta,
	   'y' => $yellow,
	   'k' => $black,
	);
 }
 
 echo rgb2cmyk(hex2rgb(get_sub_field('color_hex')));

page template :

<span class="cmyk"><?php rgb2cmyk('color_hex', $post->ID);?></span>

And I have some errors: Array to string conversion. What I am doing wrong?