navigationBarBackgroundSchemeColor property
Select which color from the passed in ColorScheme to use as background color for the navigation bar.
All colors in the color scheme are not good choices, but some work well.
If null, the default value depends on the navigationBarIsStyled value. If it is true, resulting color is background, if false, then surface color with a hard coded elevation overlay color of elevation 3, used in both light and dark theme mode, this via NavigationBar widget's default behavior.
Implementation
final SchemeColor? navigationBarBackgroundSchemeColor;