What is factory color on alt bracket and PS bracket 73 Dart 318

Semi-gloss black. All the ones I have ever seen, anyways.
I agree the brackets including the ac brackets and intake mount from the compressor were simi - black, but I believe the bolts heads and spacers were unpainted. I painted these items on my cars for cosmetic reasons. The brackets were painted before installation, but the other hardware were added upon install.