[asshanson]

Backlight color or face color? If you have black gauges and want to change the backlight you can change the bulbs behind to be blue but I think this would be really hard to see. If you have white gauges and want to change to illuminated blue you'll probably have to buy some that are pre-made that way. I don't think you could paint them with a translucent blue and turn out ok.

Either way, sounds ricey, but it's your car.