I think it's 463 Copper, as Richard said. That was the color the PO of my car painted it. I had mine restored back to the original color 467, Sand Beige Metallic (Gold).
The Rhinebeck Car show is held at the Rhinebeck (NY) Fairgrounds which is about 5 miles from where I use to live. I haven't been to that car show in about 10 years and I miss it.
My brother and nephew were both there with a 56 Chevrolet and a 65 Mustang. I'll ask them if they got to see this car.
Otto
1969 280SL, Manual, AC, Sand Beige