House of Kolors has a software program where you can change paint colors on a vehicle. They have most of the old trucks on there. Program is very nice, you can make any paint color by mixing colors or just choose one of the available ones. You can do graphics and two tones, pretty much anything you want. It also shows how the color would actually look on a vehicle, with proper reflections and shading, not just a flat color. Program is not free though, $50 a vehicle, or I believe you can buy all vehicles and any future updates for like $250. Photos of vehicles are from car shows, so some of the vehicles like the Advanced Design Suburban are street rodded vehicles which makes it a little harder to get an exact idea on what a fully stock model would look like.