Patrick,
My friends in the old car scene always ask what color the car is when inquiring about a used car. That is usually question #1. If you are looking for a deep red, then the Ruby Red is rather nice, non metallic, but if you really want a deep maroon then get on the Parts Obsolete web site. They have an older coupe under restoration that is painted a deep maroon, believe it is the Pascha Red. I saw the car in person last year and it grows on you. With some bright trim added, I think it would be stunning, and authentic. I believe it was a 51-54 color, or thereabouts. Pre A color for sure. I think sticking with an authenic color is a big plus when it goes to selling a car as you obviously are going to do with this one.
My 2 bits, Bruce