Nice car!!!! I have the same color codes. (See tag pic) The carpet should be dark brown. I have the original carpet out of my car, and the color on the tag says "Chsnt" for Chestnut. (see pic)I have new carpet for it, and the darkest brown I could get isn't as dark as the original. Right side is original...left side is repro ACC.
Here's a tid-bit. The front original front carpet in my Dart GT convertible actually says "67Val B/S" ...1967 Valiant, Bench seat...even though I have buckets in my car, but no console.