Coloring the Navigation Bar in an iOS app (including the sides of the tab) requires setting an appearance attribute within the init method. It actually only requires a few lines of code, but is a bit unintuitive.

init() {
let colored = UINavigationBarAppearance()
colored.backgroundColor = UIColor(Color.accentColor)
UINavigationBar.appearance().scrollEdgeAppearance = colored
UIBarButtonItem.appearance().tintColor = .white
}


The final line is for setting the text color of the back button. The color of the navigationBarItems can be set by directly setting the foreground color of the Images.