This sign is legal to drive in blue. It's only illegal to have red lighting in the front, and white lighting in the rear.

https://www.reflectivevinylpros.com/light-up-signs

I made these in my workshop, and I'm trying to get the word out about them before the election.

This sign is thinner than a credit card and is USB or battery powered! It glows very bright at night from a house or car window!