Most cars in America have, at most, three colors of lights on the outside. There’s white for headlights and reverse lights, red for brake lights and rear lights plus, in some cars, amber for turn signals. Mercedes-Benz has just gotten approval to add a fourth color. Turquoise blue lights indicate wh...
This would be illegal in my state. Amber and red visible from the rear and white, yellow, and amber visible from the front. Regardless, blue isn't a good color because it's reserved for emergency vehicles. Should have gone with green.
Green means go, so it genuinely sounds like a way to get rear ended.
But then again, there aren't really too many distinct alternative colors either. Purple would be too close to blue. Orange and yellow are too close to Amber. What's that really leave, magenta?