barTintColor - is a color of background. Not tint color. For example, to modify the bar background tint color for all instances of UINavigationBar: [[UINavigationBar appearance] setBarTintColor:myNavBarBackgroundColor];
https://developer.apple.com/documentation/uikit/uiappearance
barTintColor - is a color of background. Not tint color.
For example, to modify the bar background tint color for all instances of UINavigationBar:
[[UINavigationBar appearance] setBarTintColor:myNavBarBackgroundColor];
https://developer.apple.com/documentation/uikit/uiappearance