Don't know of anything that ties VIN to color. I have never seen a S/N tag anywhere but in the drivers door jam of an AD truck. The older Chevy cars did get a Fisher Body Tag on the firewall however as you may be aware. Chevrolet, or indeed GM, did not stamp paint color info on their older units.
The original color of AD trucks was a dark green unless one of the several no cost optional colors was chosen. Forrester Green (47-52, this became Juniper Green in 53') would have been a standard dark green color in 49' with Channel Green being an optional green color. It was somewhat lighter.
See my truck as an example of Juniper Green.
www.picturetrail.com/Birdhtr
