Just Google MERDC M163, and you'll get images of the patterns. The MERDC system offered 12 colors total, but used only four per scheme, so a vehicle could theoretically be custom-camouflaged for any environment on earth. In the actual universe, no unit had the man-hours to repaint every time the battalion moved a few hundred miles, or the weather changed, and the Army pretty much gave up on it after a few years. Many units just left their equipment in FS34079 Green, the factory color.
The current three-color NATO scheme replaced it, and the finish is applied in factories or restricted facilities (the new paint is pretty toxic).