I haven't messed with the lighting on my grand prix. But I have on my 79 ford f150. Originally it had incandecent bulbs mostly 194s with blue filters. The result is a green (yellow +blue). I converted over to blue LEDs retrofits that fit the original sockets for all bulbs in the dash. Some places I recall the blue filter was built in or otherwise difficult to remove so I tried it anyway. I can honestly say all the lighting looks exactly the same between straight blue led and blue led + blue filter.
If you stick with the same color it should work fine. Worst case it will be very slightly dimmer with the filter than without but LEDs are bright to make up for it. The LEDs I used are not dimmable so I would sugggest you buy ones that are. I got my stuff from super bright LEDS.
