colorScheme property
Implementation
static var colorScheme = ColorScheme.light(
primary: black,
primaryContainer: blue,
onPrimary: blue,
secondary: CupertinoColors.systemGrey6,
secondaryContainer: CupertinoColors.secondaryLabel,
background: green,
surface: yellow,
error: red[700]!,
onSecondary: gray[200]!,
onBackground: white,
onSurface: yellow[100]!,
onError: red[100]!,
);