toHex method

@override String toHex()

Implementation

@override
String toHex() {
  Function toHex = (int x) {
    var hex = x.toRadixString(16);
    return hex.length == 1 ? '0' + hex : hex;
  };
  return "#" + toHex(r) + toHex(g) + toHex(b);
}