code: function(n) {
              n = parseInt(n,10)|0;
              n = (n > 255 || n < 0) ? 0 : n;
  
              return (ZERO+n.toString(16)).slice(-2).toUpperCase();
          }
docs: Converts an int 0...255 to hex pair 00...FF
  @method dec2hex
  @param n {int} the number to convert
  @return {string} the hex equivalent