From the April 2013 issue of Entrepreneur
How smart you are to think this through!  First, is there a signature color for your logo or company?  If so, consider that color.  If corporate identity is not an issue, go with your favorite color.  If it is a memorable color -- bright red or bright blue, for instance -- you will be remembered for the color of your truck.  It will be a  part of your personal brand.

No matter what color you choose, make sure your truck is always clean and sharp both inside and out.  A messy truck sends a bad message about your attention to detail.