bottomNavigationBarUnselectedIconSchemeColor property

Select which color from the passed in ColorScheme to use as base for the BottomNavigationBar's unselected items icon color.

All colors in the color scheme are not good choices, but some work well.

If undefined, defaults to SchemeColor.onSurface, and adds an alpha blend and opacity,if bottomNavigationBarMutedUnselectedLabel is true.

If useFlutterDefaults is true, and this property and all other icon modifying properties are undefined, the effective color will be ThemeData.unselectedWidgetColor which is Colors.black54 in light mode and Colors.white70 in dark.