Unable to set a UIBarbutton back to the default tint color

If I change the tint of a UIBarbutton how can I reset it to it's default tint. Here I am set a custom tint for a button... ``` examCancelButton.style = UIBarButtonSystemItemCancel; examCancelButton.tintColor = myRedButtonTint; ``` Then later I need to set it back to it's default style and tint. So I thought just setting the style to UIBarButtonItemStyleDone would do the trick like this... ``` examCancelButton.style = UIBarButtonItemStyleDone; ``` But the color remains red. I can set it to a nice blue color on my own, but I would like to get the default color of a UIBarButtonItemStyleDone button. Is this possible? Thanks, John