Tony,
Interior paint color was dictated by the interior type of the car. For example a deluxe parchment interior car like mine has black paint. A Deluxe Blue interior car will have blue paint. If the car is a Norwood car the paint color will be indicated by a letter in the upper right hand corner of the trim tag. My site is not completely done yet but I put up the decoding page for 67 which would give you the color codes and the manufacturer paint number in a table below it. The page and the site is still under construction but this page is close to the final revision.
67 Trim Tag Decoding and Interior Paint Info
Hope it helps,
Mike