CODE EXAMPLE FOR DART

flutter color

Colors.white
Color(0xffA5A4A4)
Color(0xffA5A4A4).withOpacity(.5)
Color.fromRGBO(38, 38, 38, 0.4)
Color.fromARGB(255, 66, 165, 245);
Color.fromARGB(0xFF, 0x42, 0xA5, 0xF5);