backgroundColor property Null safety
The fill color to use for an app bar's Material.
If null, then the AppBarTheme.backgroundColor is used. If that value is also null, then AppBar uses the overall theme's ColorScheme.primary if the overall theme's brightness is Brightness.light, and ColorScheme.surface if the overall theme's brightness is Brightness.dark.
- foregroundColor, which specifies the color for icons and text within the app bar.
- Theme.of, which returns the current overall Material theme as a ThemeData.
- ThemeData.colorScheme, the thirteen colors that most Material widget default colors are based on.
- ColorScheme.brightness, which indicates if the overall Theme is light or dark.
final Color? backgroundColor;