The iconic scheme birthed his other famous nickname, the Man in Black — but as it turns out, General Motors initially wanted the car to be blue. According to Earnhardt's long-time boss Richard ...

In fact, one of the coolest police cars in America, in Alabama, had only a single blue light on its roof. This is when whether the lights are flashing or solid comes into play. In most cases ...

Mercedes-Benz has just received approval to add a fourth color: turquoise blue lights that indicate when a Mercedes car is driving itself. Only California and Nevada have approved the new light color.

Bringing the car to a stop are Brembo six-piston calipers at the front and four-piston calipers at the rear. The orange paint of the calipers acts as a nice contrast to the light blue paint.

There is also a small but significant move by some agencies to forego the red/blue light variation for blue lights only. Years ago, if you were to ask a child to draw a police car, you would ...