Do side marker lights have to be amber?

Do side marker lights have to be amber?

Color of clearance lamps, side marker lamps, reflectors, and backup lamps. Front clearance lamps and those marker lamps and reflectors mounted on the front or on the side near the front of a vehicle must display or reflect an amber color.

side marker lights in other positions, can be any color,such as red , yellow , blue , green , white or colorful.