Hi! I have a 2002 Elantra GLS with the olive colored gauges. I would like to change my gauges to a nice blue, but I'm unsure how labor intensive it is. Is it just the bulb that gives the gauges its color? Or is it an olive colored film behind the gauges? Any help would be greatly appreciated. Also, don't tell me to use the search bar, because I did and didn't get a definitive answer.