If you have a trailer sales or rental facility in your area you can get an exact match wiring harness for around $25.00.
It plugs directly into the factory plug where each taillight is connected and removes cutting and or splicing the original wiring on the truck.
It looks like this:
It's an in-line plug on each side. Unplug the trucks taillight, plug the harness in, plug the taillight back into the harness.
To answer your question, no I'd have to pull my taillights to check the colors.