"It's your car - do what you want" is a bit simplistic, but it rings true. I changed the color of my 1969 Super Bee from gold (blech) to vitaman C orange, which was available in 1969 (apparently, no super Bees were painted this color, but hey).
So far, everyone loves it (I think) and it makes me much happier. Thing is, the next fanatic after me is more than welcome to change it back to (blech) gold.
Now, if it was a numbers matching hemi car, there may be a case for keeping it original. However, there was a recent article on the owner of a 1960s Ferrai 250 GTO (worth, what...15-20 million?) who changed the color to metallic red. He loves it, and purists be damned. It's his car, and when it comes time to sell, he'll get all the money for it. You and I, on the other hand, own mass produced cars so what's the harm?
I would say paint it your choice of colors, but if you wanna play it safe, pic a color available for your car's year.
Then drive the heck out of it.