colorScheme property
Implementation
static var colorScheme = ColorScheme.dark(
primary: white,
primaryContainer: blue,
secondary: CupertinoColors.systemGrey6.darkColor,
secondaryContainer: CupertinoColors.secondaryLabel.darkColor,
background: green,
surface: yellow[300]!,
error: red,
onPrimary: blue,
onSecondary: const Color(0xFF212122),
onBackground: black,
onSurface: const Color(0xFF3c1e00),
onError: const Color(0xff400102),
);