Custom Theme DatePicker Flutter

showDatePicker(
  builder: (context, child) {
    return Theme(
      data: Theme.of(context).copyWith(
        colorScheme: ColorScheme.light(
          primary: Colors.yellow, // header background color
          onPrimary: Colors.black, // header text color
          onSurface: Colors.green, // body text color
        ),
        textButtonTheme: TextButtonThemeData(
          style: TextButton.styleFrom(
            primary: Colors.red, // button text color
          ),
        ),
      ),
      child: child!,
    );
  },
);

How to customize a date pickerStack Overflow