Tex. Transp. Code § 547.303

Current with legislation from the 2023 Regular and Special Sessions signed by the Governor as of November 21, 2023.
Section 547.303 - Color Requirements
(a) Unless expressly provided otherwise, a lighting device or reflector mounted on the rear of a vehicle must be or reflect red.
(b) A signaling device mounted on the rear of a vehicle may be red, amber, or yellow.

Tex. Transp. Code § 547.303

Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995.