I have done a little studying on this myself for my 65. It appears the most widely-used color was called "Fawn", which I believe is sort of a beigh, or tannish-brown. I know that's not very descriptive, but in my mind I imagine the color of a deer's coat. There were also a couple of other colors used. Maybe you can find some color chips at a body shop and one will be "Fawn". Good Luck.

Dave