Change navbar color

Is there a way to change the color of the Navigation bar in Xamarin.Forms? I am using a shared class lib.

Example:

I found a way to change it, but this was only possible on iOS only. https://developer.xamarin.com/recipes/ios/content_controls/navigation_controller/change_the_nav_bar_color/

How can you accomplish such in Xamarin.Forms? Or is there no way?