Obviously, its personal opinion, but you may find in the end that black on black is terribly boring. I know this because I have that is (almost) black-on-black, and I find it to be, visually speaking, terribly boring. As it was, using a black grip (burnt cork rings, turn your own handle, if you're that motivated) would be even more boring.
I hoped that the red twist spirals would be far more visible than they are, but the overwhelming amount of black ("none more black" - N. Tufnel) makes it more or less lost in the mix. Its boring in a way that it shouldn't be.
The only place it really shows up, and even then its muted, is at the hook keeper:
Except, it doesn't. When you look close, its very nice, but as a whole, its just lost. It may be because I opted to use red/black twist, which is obviously even MORE black, but this is my suggestion that the novelty of a none more black rod would be terminally boring in the end.
I can assure you despite the main thread appearing crimson, it is not. Black Pac Bay with CP. I don't remember who makes the red/black twist, but its likely either Pac Bay or Gudebrod.
Part of the fun (ymmv) is making something that stands out. Picking visually appealing colours should be a part of that. However, if black-on-black is what you want, then so be it.
There are two basic types of thread, regular and NCP (No Colour Preserver). When you use regular thread, without CP (Colour Preserver) it goes to a generally transluscent state.
Using a black blank, with black primary wrapping, and no CP will result in a rod that has no visible trim wraps, they'll just sort of vanish into the mix. The guide feet will, however, be visible across the blank. You'll see this taken to the next level with transparent wraps, which are silk thread, no CP, and a very thin finish. Its very popular (read: played out) on modern bamboo and boutique fiberglass rods.
If you plan to utilize trip wraps, or you don't want your feet to be visible, you will need to use CP on your thread or NCP thread.
Having used CP on that rod, I hope to never need to use it again. There is no NCP twist thread available, so I had no other choice. You, on the other hand, do.