Actually the rear turn signals can be RED or AMBER. It does not have to be exclusively red. Brake lights have to be red only.

The front of the vehicle is only allowed to have lights that emit either a amber/yellow or white color.

A majority of cars do have amber reflectors either built into the headlights or mounted on the front bumper somewhere. I can't think of a car you would see everyday that doesn't have any amber in the front from factory.

 

Just make sure you put a yellow or amber bulb and you will probably never get harassed over it.

 

Whoops. That's what I meant. Must be red or Amber.