I recently changed my bulbs in my car's HVAC dash to LEDs. I wanted a blue color and it looks really good and exactly what I wanted. The only problem is that there are three buttons that are lit separately from the new LEDs by green bulbs, which I want to be blue as well, but I cannot simply change those bulbs (they are hard-wired in, not a plug-in-play bulb socket). Since I cannot change the bulb, my idea was to add a translucent color paper to the little "window" that displays the color on the button, but I don't know what color(s) to use. Basically, in other words, what color paper can I use to make green light turn to blue? To make matters more complicated, the temperature select button has a blue, white and red selector. They are all "supplied" with light from the new blue LED. Obviously the blue works, but the rest is all blue, which means I have one long blue strip, rather than three segmented colors. I would like to do the same thing with the color paper to get to white and red. I'm thinking for the white, I can add green and red paper together to make the white (the three primary colors together)? What about the red? Can any of this be done, or is there another way of going about it? Here is a picture of my dash for reference. I can add more pics if necessary. You can see the two green color buttons and the one yellowish-green button as well as the temp. select, which is trying to be blue, white and red, but is mostly blue. I appreciate the help, thanks!