Flutter snackbar color

ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            backgroundColor: Colors.green,
            content: const Text('Awesome Snackbar!'),
          ),
        );

Source: flutter.dev

Flutter snackbar

final snackBar = SnackBar(
  content: Text('Yay! A SnackBar!'),
  action: SnackBarAction(
    label: 'Undo',
    onPressed: () {
      // Some code to undo the change.
    },
  ),
);

 // Find the Scaffold in the widget tree and use
 // it to show a SnackBar.
 Scaffold.of(context).showSnackBar(snackBar);

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