toName method
get color name
Implementation
String? toName() {
List<String> colorCodes = colorNames.keys.toList();
for (String code in colorCodes) {
num r = int.parse(code.substring(0, 2), radix: 16);
num g = int.parse(code.substring(2, 4), radix: 16);
num b = int.parse(code.substring(4, 6), radix: 16);
if (_color!.red == r && _color!.green == g && _color!.blue == b) {
return colorNames[code];
}
}
return "";
}