How To change bottom bar color in flutter

Question

I am creating an app which shows the result of our university students but in my app, the bottom bar of app color does not change how can I change the color of the bottom bar in flutter here I post an image Click to see image

Answer 1

if I understood correctly you want to change the color of your system navigation bar

void main() {
  SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
    systemNavigationBarColor: Colors.red,
  ));
  runApp(MyApp());
}

this will change its color.