I hadn't even considered this, but apparently the color of your car has a major influence over the resale value. Here's a study from I See Cars.
First off if you went with a basic common color like black, white or silver it didn't really effect the resale value.
If you went bold with yellow, congratulations that is the best color for resale on both cars and SUV's!
For pickup trucks it's beige. A distant 2nd is white.
They even breakdown specialty vehicles like convertibles and minivans. By the way red is #1 for convertibles and for the minivans blue and white are almost tied.
Check their list to see where your color falls.