accentColor is deprecated and shouldn't be used

Issue

The accentColor in ThemeData was deprecated.

What to use then in ThemeData?

theme: ThemeData(
    brightness: Brightness.light,
    primaryColor: kBaseColor,
    accentColor: kBaseAccentColor, // 'accentColor' is deprecated and shouldn't be used

Solution

accentColor is now replaced by ColorScheme.secondary.

• Using new ThemeData:

  theme: ThemeData(
    colorScheme: ColorScheme.fromSwatch().copyWith(
      secondary: Colors.red, // Your accent color
    ),
  )
  

• Using existing ThemeData:

  final theme = ThemeData.dark();
  

  You can use it as:

  theme: theme.copyWith(
    colorScheme: theme.colorScheme.copyWith(
      secondary: Colors.red,
    ),
  )
  

Answered By - CopsOnRoad