UIBarButtonItem setTintColor white but when run in a real phone it change to gray

Question

I set the UIBarButtonItem tintColor to white, It is white appearance in storyboard and the simulator，But when run in a real phone it comes to gray! Why are so strange?

In real phone:

Simulator:

Also When set a UIBarButtonItem image has the same problem

In real phone:

In Simulator:

Answer 1

I had the same problem and next approach helped me:

1. Go to the iPhone Settings -> General -> Accessibility -> Increase Contrast
2. Darken Colors turn off;