I have a UINavigationItem, but I can\'t found anything beside tittle, prompt, and back button in attribute inspector
One possible solution is to embed the View Controller it is containing the Navigation Item in a Navigation Controller and access to properties color of Navigation Bar:
// Color title 'navigationItem'
UINavigationBar.appearance().titleTextAttributes = [NSForegroundColorAttributeName: UIColor.whiteColor()]
// Background 'navigationBar'
UINavigationBar.appearance().barTintColor = UIColor.blackColor()
// Color title 'navigationBar'
let color = UIColor.orangeColor()
self.navigationController?.navigationBar.topItem?.backBarButtonItem?.setTitleTextAttributes(
[NSForegroundColorAttributeName: color], forState: .Normal)