change color of elevated button flutter code example

Example 1: elevated button flutter color

ElevatedButton(
  style: ButtonStyle(
    backgroundColor: MaterialStateProperty.resolveWith(
      (Set states) {
        if (states.contains(MaterialState.pressed))
          return Colors.green;
        return null; // Use the component's default.
      },
    ),
  ),
)

Example 2: elevated Button Theme background color in flutter

style: ElevatedButton.styleFrom(
              primary: Colors.purple,
            ),