I have, indeed, a lot of brown and black straps, but I also have some green Khaki, Blue, Yellow and Blue, Burgundy and Blue, Red, Beige, Grey straps...
But it is a matter of fact that my fav are the Brown, Black, Beige, and Khaki.
Not too aventurous?
What about this one? ( the one on the Tornek Rayville, of course )

Best,
Nicolas