Delaware Code
Subchapter II. Lights
§ 4339. Color of clearance lamps, side marker lamps, backup lamps and reflectors.

(a) Front clearance lamps and those marker lamps and reflectors mounted on the front or on the side near the front of a vehicle shall display and reflect an amber color.
(b) Rear clearance lamps and those marker lamps and reflectors mounted on the rear or on the sides near the rear of a vehicle shall display and reflect a red color.
(c) All lighting devices and reflectors mounted on the rear of any vehicle shall display or reflect a red color, except the stoplight or other signal device, which may be red, amber or yellow, and except that the light illuminating the license plate shall be white and the light emitted by a backup lamp shall be white or amber.

Structure Delaware Code