Let's not scamper toward irrelevancies (any more than usual). Black in a camo pattern and solid black are completely different beasts. Solid black is dramatic and easy to make uniform, but is much worse than a solid khaki as a field uniform.

The important issue is not whether or not their are black animals in nature, but how black or other dark speckling effects the quality of a camo pattern. Camo is about deception and illusion. Easy but poorly thought out positions about 'black in nature' are secondary to the need to deceive the observer's eye and create the illusion that the uniform is consistent with the back ground.

It seems to me that there are so many camo patterns in the world, we could do brute force, competitive testing of all of them, and, if needed, make minor adjustments to the winner to circumvent copyright/patent/trademark problems. Compare Multicam (tm) to WW II German infantry patterns, or the current German Flecktarn.