i live in nashville and i actually went to the government building
Its illegal for them to be red or blue. White is often thought to be illegal but they dont really do anything about it
also any flashing strobing or anything like that is also illegal.
If you want solid green purple orange yellow aqua etc your A Okay.
But the white might get you into trouble.
keep in mind, cops can give you a ticket for whatever they want to really.
Smart cops know white is okay
dumb ones dont and they'll give you a ticket regaurdless