Originally Posted by 12sechatch
It has ALWAYS been illegal to have your MAIN lights be any other color than white. SECONDARY lights, ie fogs, are allowed to be yellow.
You sure about that now? I cannot find any RCW that clearly defines what color headlights have to be. There is laws for other lights though. It It could be buried within other RCW's but I didn't find it.
The only mention of it is through the SAE which states "all headlamp bulbs must be white in color as defined by Society of Automotive Engineers and FMVSS 108. FMVSS 108 disallows any color coating on headlights and or headlight bulbs."
However, I think you can find a loop hole if you were to get pulled over based off the fact this is not mentioned anywhere in an RCW.