As far as seat frames, I bet 98% that they are a semi gloss black, not a full on gloss black, and not too dull either.
Most always any add on things were black. Or charcoalish gray, like steering columns, etc. Then there was the special heater hammmered gray paint. I fully understand you don't want a guess at it. I'm the same way. Don't try to copy what others have done there are likely only a very small amount of people anywhere that really know. Only someone with a true factory original can know for sure, unless they remember them new. As a kid I never even got close to a TF suburban. Rode in a 1960 suburban, but don't remember color of seat frames.
