shadowColor property Null safety
The color used to paint a drop shadow under the dialog's Material, which reflects the dialog's elevation.
If null and ThemeData.useMaterial3 is true then no drop shadow will be rendered.
If null and ThemeData.useMaterial3 is false then it will default to ThemeData.shadowColor.
- Material.shadowColor, which describes how the drop shadow is painted.
- elevation, which affects how the drop shadow is painted.
- surfaceTintColor, which can be used to indicate elevation through tinting the background color.
final Color? shadowColor;