You can use NSAttributrString for UINavigationBar title:
NSDictionary *attributrs = @{ UITextAttributeTextColor : [UIColor redColor], UITextAttributeFont : [UIFont fontWithName:@"ArialMT" size:14.0]};
[[UINavigationBar appearance] setTitleTextAttributes: attributrs];
You can add it to AppDelegate didFinishLaunchingWithOptions: methods and all of your NSNavBar will apply this.