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Hex to RGB or RGBA transluder

/ Published in: JavaScript
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Transform a color given in hex to RGB. An optional opacity argument also enables RBGA.

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  1. function hex2rgb(hex, opacity) {
  2.   var rgb = hex.replace('#', '').match(/(.{2})/g);
  3.  
  4.   var i = 3;
  5.   while (i--) {
  6.     rgb[i] = parseInt(rgb[i], 16);
  7.   }
  8.  
  9.   if (typeof opacity == 'undefined') {
  10.     return 'rgb(' + rgb.join(', ') + ')';
  11.   }
  12.  
  13.   return 'rgba(' + rgb.join(', ') + ', ' + opacity + ')';
  14. };

URL: http://madr.se/blog/151

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