Since you haven't replied with a description of the truck... I will offer this.
Color gives the vehicle a certain personality. I always like for the personality to fit the vehicle.
If it is a blown Hemi powered Model A... you might want an "excitement color" like red, orange or yellow.
If it is a lowered El Camino with fender skirts and a great interior and sound system... you might want a "dreamy color" like blue or aqua.
If it is a slammed late model with a big inch V8 with injection, and 20 inch rims with wide tires... you might want a powerful "masculine color" like black, or dark red.
If you want the truck to look "exotic"... use purples, turquoise, lavender or a pink-orange.
If you want it to look valueable, use gold, dark metallics, or black.
I think this might give you idea how one color does not fit every build.