Example 1: color() in flutter
Color myHexColor = Color(0xff123456)
Example 2: flutter get a MaterialColor from rgb
Map<int, Color> colorCodes = { 50: Color.fromRGBO(147, 205, 72, .1), 100: Color.fromRGBO(147, 205, 72, .2), 200: Color.fromRGBO(147, 205, 72, .3), 300: Color.fromRGBO(147, 205, 72, .4), 400: Color.fromRGBO(147, 205, 72, .5), 500: Color.fromRGBO(147, 205, 72, .6), 600: Color.fromRGBO(147, 205, 72, .7), 700: Color.fromRGBO(147, 205, 72, .8), 800: Color.fromRGBO(147, 205, 72, .9), 900: Color.fromRGBO(147, 205, 72, 1),};
Example 3: how to give shade to the colors in flutter
ThemeData(primarySwatch: Colors.lime.shade700),