Specifies the BottomNavigation theme color. (see example).
The possible values are:
primary(Default) — Applies coloring based on the primary theme color.secondary— Applies coloring based on the secondary theme color.tertiary— Applies coloring based on the tertiary theme color.base— Applies coloring based on the base theme color.inverse— Applies coloring based on the inverted theme color.
Possible values:
"base""primary""secondary""tertiary""inverse"