code: function rgbaToHex(r, g, b, a) {
  
              var hex = [
                  pad2(convertDecimalToHex(a)),
                  pad2(mathRound(r).toString(16)),
                  pad2(mathRound(g).toString(16)),
                  pad2(mathRound(b).toString(16))
              ];
  
              return hex.join("");
          }
docs: `rgbaToHex` Converts an RGBA color plus alpha transparency to hex Assumes r, g, b and a are contained in the set [0, 255] Returns an 8 character hex