It depends on the look that you are going for.
Personally I like the grey since it picks up some of the accents in the carbon fiber
Black and carbon fiber matches, but it may create too dark of an interior (easily fixed by adding the panoramic roof) and the auto cool function should keep in relatively cool. I know on my Firebird in NJ the interior got insanely hot, melted some plastic items I had in the car, but that did not have the auto cooling.
If you want contrasting the tan and carbon fiber. My fear with that is that it will look dated in a few years. What I was told to never mix brown and black, but the current trend is to mix them. When this trend will end, if it does end, would make the car look dated.
Disclaimer: Never take fashion advice from a male engineer