Out of curiosity on this ... so BLUE or RED light to the front and rear is OK .... as long as we do not combine both colors there are no problem.
These laws vary from state to state and are selectively enforced. But it is pretty common in many states that blue and red lights are prohibited or proscribed in certain ways. I know people who have gotten away with it for years in a state where it is illegal and people who got a ticket the first time they rode with blue LED lights on the SIDE of their motorcycle. We just keep it simple: no red or blue lights...period.