JS function for converting a `HEX` colour code string with an alpha component, to `RGBA`.

hexToRGBA.js

function hexToRGBA(hex, opacity){
  var rgba = "rgba(";
  var inc = Math.abs(hex.length - 5);
  for (var i = 1; i < hex.length; i+=inc){
    var component = hex[i] + hex[i + (inc-1)];
    rgba += parseInt(component, 16) + ",";
  }
  return rgba + opacity + ")";
}
// abs() gives absolute val (modulus); -5 just produces correct increment (1 or 2, based on length of 4 or 7... #f0f vs #ff00ff)