MoboMac, I suspect that you are correct. My '64 CS came with factory white seats and factory maroon (not red) padded dash, maroon carpet, and maroon carpet on the bottom of the door panels. When I ordered my complete new interior from NOS, I was able to get the factory 80/20 loop maroon (#13 Maroon) carpet and the matching carpet for the door panels. I have owned my CS since 1975 and honestly do not remember ever seeing a '64 without a blue or maroon dash. For certain, I have never seen a '64 CS with a black dash and carpet. For what it's worth . . .
This tells the story.....Parchment/Blue....Parchment/Maroon....AND Parchment /Saddle....Now THAT is BUTT UGLY....never seen one... cause they prolly DIDN't make any....