Hi GUNG, seems like we travel in the same circles! I would pick ebano because it is so lusciously chocolatey and it really is BV's signature color. I have an ebano veneta and I it! Can't go wrong with either, though, for sure! Good luck!
I think you need to decide what color most of the linings in your bag are, and then pick a wallet in the opposite color. I love having a light-colored wallet as it's usually easier to find in the abyss of some bags.