How to set Scrollbar colour in flutter?

You can use RawScrollbar instead and set the thumbColor to whatever color u like.

child: RawScrollbar(                    thumbColor: Colors.redAccent,                    radius: Radius.circular(20),                    thickness: 5,                    child: //scrollable widget                   )

Scroll bar uses the highlight color.. so just add ur desired scrollbar color in the highlightColor inside Theme in MaterialApp and you are done.

MaterialApp(      debugShowCheckedModeBanner: false,      theme: ThemeData(        //main color        primaryColor: const Color(0xffFFC600),        //main font        fontFamily: 'Roboto-Medium',        //swatch stretching        primarySwatch: goldenThemeColor,        visualDensity: VisualDensity.adaptivePlatformDensity,        splashColor:  const Color(0xffFFC600),        //color for scrollbar        highlightColor: Color(0xffffc600)      ),      routes: {        '/' : (context) => SplashScreen(),        ...      }      initialRoute: '/',    )

I changed it like this.

class MyApp extends StatelessWidget {  @override  Widget build(BuildContext context) {    return MaterialApp(      debugShowCheckedModeBanner: false,      theme: ThemeData.light().copyWith(        scrollbarTheme: ScrollbarThemeData().copyWith(          thumbColor: MaterialStateProperty.all(Colors.grey[500]),        )      ),    );  }}