Original Seat Colors

My '66 has light brown front and rear seat. there were two sets of covers over these, an older set and a newer set. The seats are in immaculate shape and I would like to keep them, but I also want to make sure that it is original as possible. My question is whether or not it would have had anything other than black seats in it.

 

Teal blue/green in my 67 factory color. Not sure on the brown but there where other colors then black.

 

By '72 the two colors were tan or black, but '66 was before my time. I would be surprised if tan was not the original color.