flutter appbar color theme code example

Example 1: how to change appbar color in flutter

appBar: AppBar(
      title: const Text('Example'),
      backgroundColor: Colors.black,
    ),

Example 2: appbar theme flutter

appBarTheme: AppBarTheme().copyWith(
          textTheme: TextTheme(
            headline6: TextStyle(
              fontFamily: 'Open Sans',
              fontWeight: FontWeight.bold,
              fontSize: 20,
            ),
          ),
        ),