Yeah, GM loves to tint the overlays to get the right color. They used yellowish bulbs behind a blue overlay to achieve the Impala/Monte factory colors.

If you took white LEDs/bulbs and stuck them behind the factory cluster it would glow blue. Even though I have a new overlay, I still have white LEDs behind it and it still glows blue. The red warning areas and red needles look GREAT that way.

http://img.photobucket.com/albums/v3...p/DSC02267.jpg