If you have the clear bulbs then it means that you have the gauge face that has a "film". Even if you change the bulbs, they will still be filtered off by this film.
The best way to do this is to carefully disassemble your gauge cluster. Carefully remove the clear cover, gauge needles and stoppers and with a thin knife (or something similar) pry off the 3 gauge faces.
Hold it against a bright light and note which of the colors you want to change. In my case, I only wanted to change the greens to blue.
Here's a short thread regarding that
http://www.explorerforum.com/forums/showthread.php?t=187754
On the third picture (with the knife), notice that the "kmh" has been scraped off and is now white - compared to the other letters and numbers that are still dark gray.
good luck