OrinZ

<?
function rgb2hsl( $rgb ) {
    $rgb = trim($rgb, '#');
    if( strlen($rgb) == 6)
        $rgb = str_split($rgb, 2);
    elseif( strlen($rgb) == 3)
        $rgb = array($rgb[0] . $rgb[0], $rgb[1] . $rgb[1], $rgb[2] . $rgb[2]);
    foreach($rgb as &$value)
	    $value = hexdec($value) / 255;

OrinZ

/* bookmarklet for extracting rev=canonical if it exists, or simply notifying if one does not */
(function(){
  var url=document.location;
  var links=document.getElementsByTagName('link');
  var found=0;
  for(var i = 0, l; l = links[i]; i++) {
    if (l.getAttribute('rev') == 'canonical' || (/alternate short/).exec(l.getAttribute('rel'))) {
      found=l.getAttribute('href');
      break;
    }