Australian WordPress Developer | Dion Hulse

So a ticket popped up on trac, mentioning the Gray colour scheme example colours were out of date, gave me a quick idea to make a script to make a colour palette of the colour schemes (ie. All colours used in the colour css file), so here we have it:

Fresh – Gray

Classic – Blue

Script used

<?php
$file = ABSPATH . 'wp-admin\\css\\colors-classic.dev.css';
$file = escapeshellarg($file );

$in = shell_exec("grep -i -o -e #[0-9a-f]\\{3,6\\}\\b $file | uniq -i");

$in = str_replace(array(':', '#', ' '), '', $in);

$in = explode("\n", $in);
$in = array_filter($in);

foreach ( $in as $i => $v ) {
  if ( strlen($v) == 3 )
    $in[$i] = $v[0] . $v[0] . $v[1] . $v[1] . $v[2] . $v[2];
}

$out = array();
foreach ( $in as $rgb ) {
   $r = hexdec( substr($rgb, 0, 2) );
   $g = hexdec( substr($rgb, 2, 2) );
   $b = hexdec( substr($rgb, 4, 2) );
   $hsl = rgb2hsl($r, $g, $b); // we'll sort it by the Saturation
   $out[ strtolower($rgb) ] = $hsl;
}

uasort($out, function($a, $b) {
return $a[1] > $b[1];
});

foreach ( $out as $c => $hsl ) {
   $f = ($hsl[2] > 0.6 ) ? '000' : 'fff';
  echo "<div style='background-color: #$c; color:#$f; width: 80px; height: 40px; display: inline-block;'>#$c</div>";
}

foreach ( $out as $c => $hsl ) {
   $f = ($hsl[2] > 0.6 ) ? '000' : 'fff';
  echo htmlentities("<div style='background-color: #$c; color:#$f; width: 80px; height: 40px; display: inline-block;'>#$c</div>") . '<br />';
}

function rgb2hsl($r, $g, $b) {
 $var_R = ($r / 255);
 $var_G = ($g / 255);
 $var_B = ($b / 255);

 $var_Min = min($var_R, $var_G, $var_B);
 $var_Max = max($var_R, $var_G, $var_B);
 $del_Max = $var_Max - $var_Min;

 $v = $var_Max;

 if ($del_Max == 0) {
 $h = 0;
 $s = 0;
 } else {
 $s = $del_Max / $var_Max;

 $del_R = ( ( ( $var_Max - $var_R ) / 6 ) + ( $del_Max / 2 ) ) / $del_Max;
 $del_G = ( ( ( $var_Max - $var_G ) / 6 ) + ( $del_Max / 2 ) ) / $del_Max;
 $del_B = ( ( ( $var_Max - $var_B ) / 6 ) + ( $del_Max / 2 ) ) / $del_Max;

 if ($var_R == $var_Max) $h = $del_B - $del_G;
 else if ($var_G == $var_Max) $h = ( 1 / 3 ) + $del_R - $del_B;
 else if ($var_B == $var_Max) $h = ( 2 / 3 ) + $del_G - $del_R;

 if ($h < 0) $h++;
 if ($h > 1) $h--;
 }

 return array($h, $s, $v);
 }
?>

This post was edited to correct a few things, including sorting by the saturation of the colour rather than alphabetically.