Forester Green was the standard color for all non-Suburban Chevrolet trucks from 1947-1952. Juniper Green was the standard color on all trucks from 1953-55.
A variety of exterior colors were no-added-cost Regular Production Options. The colors available in all Advance-Design years are shown in a Stovebolt.com Tech Tip.
Regarding the title code/number, many people think that it was more common for the engine number to be used as a title umber. That has not been my experience - 50%/50% cab-code/engine-code has been the case with the several trucks that I gave owned.