it would be nice to see a hypermelamine dragon...but you probably have to start with normal phase dragons and look for those who are darker than normal. Not as many people in the reptile industry as a whole, is interested in a dark brown/black animal. Yet a 'black/white' type animal seems popular in other reptiles, where there is a lack of both red and brown pigments, or lack of yellow as well....giving a more black and white appearance..or the much desired leucistic animal, one that is all white.
Certainly if you have the time, space and money, you can definitely go for creating a dragon which lacks the reds, yellows and oranges or has a high level of melamine present..to give a very dark or 'black' dragon. They may look quite stunning, and a market could be had...right now the translucents and reduced to no scale varieties seem to be popular (I do see them in Canada now, saw some advertised on a Canadian reptile site..and the hypos have been available too for a few years). No reduced scales yet...but I am sure they will come eventually. Not that I plan to pick up any, just no room..and I am happy with my single bearded dragon).
-----
PHLdyPayne