I went down last week to go over Cerakote color with Brad. We got it real close, and he tweaked it just a bit and sprayed and baked a test sample. Not sure of the final ratios, but it is a mixture of approximately 80% Copper Bown, 15% Gold, 5% S&W Red. It actually has a hint of metallic in it when seen in the sun. Badass.
Action, barrel metal/brake, bolt handle, bolt shroud will be copper.
Bottom metal, bolt body, Picatinny rail will be armor black.