asHexString method
Returns
Implementation
String asHexString() {
final buffer = StringBuffer();
buffer.write("#");
buffer.write(r.toRadixString(16).padLeft(2, "0"));
buffer.write(g.toRadixString(16).padLeft(2, "0"));
buffer.write(b.toRadixString(16).padLeft(2, "0"));
return buffer.toString().toUpperCase();
}