As there seems to be both brown and black in the hounds tooth jacket pattern, it goes either way. I'd go of the kilt. A pattern such as Blackwatch (esp in modern) and those based on it (including my own MacNeil). An ancient toning usually goes either way (again depending upon pattern and coloring). As for the kilt in the pic, I'd say either way.

Of course actual colors may vary due to monitor setting, camera settings, and eye perception. Use other's advise with wisdom and discresion. Results may vary, etc. . .

In other word, use common sense: If much black, use black. If much navy and no black, use brown. Otherwise, do as you like.