Within your AppDelegate.swift, in didFinishLaunchingWithOptions:
UINavigationbar.appearance().barTintColor = UIColor.greenColor() language-UINavigationbar.appearance().barTintColor = UIColor.greenColor()>Optionally, if you need a specific color, how you do it with RGB:
UINavigationBar.appearance().barTintColor = UIColor(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)