Slider in Flutter - Sample Code

 Slider sample code  with theme customization flutter

theme property for widget - floating action button

 floatingActionButton: Theme(

  data: ThemeData(accentColor: Colors.green),
  child: FloatingActionButton(
    child: Icon(Icons.add),
  ),
),

theme reference - bg color text color

 Widget build(BuildContext context) {

  return MaterialApp(
    theme: ThemeData(
        primaryColor: Color(0xFF0A0E21),
        scaffoldBackgroundColor: Color(0xFF0AE21),
        accentColor: Colors.purple,
        textTheme: TextTheme(
          body1: TextStyle(color: Color(0xFFFFFFFF)),
        )),
    home: InputPage(),
  );