UIBarButtonItem Highlighted Color

I have set a custom tint color for a UINavigationBar (within a UINavigationController) which, in turn, sets an appropriate matching color for the UIBarButtonItems which are inserted into the UINavigationBar. However, when I select a UIBarButtonItem the button turns into (presumably) the highlighted state and presents a different color, which looks quite a bit out and does not nicely match the tint color. Is there a way to change this highlighted state color to a custom color?

Ideally, I would like to just create a category on UIBarButtonItem which changes the highlighted color for all instances of UIBarButtonItem, as this would avoid the need to explicitly subclass UIBarButtonItems and then change every reference in my app to use the subclass (which will be tricky, as I am using some third-party libraries which just use UIBarButtonItem and I don't want to go messing with their implementation).

Any help would be greatly appreciated.