If it helps any the black pigmentation on the fish does not look, in any way, normal. Possibly a heavy but not life-threatening parasitic infestation or a quirk of malnutrition or something else that might have to do with the fish's diet.
Over the past few months I've observed a tank of female "Mixed Peacock", quite expetedly hybrids, at a local chain store with the same issue. The pigment increases and there's nothing to positively identify the occurance.
To add, it's not a phenomenon uncommonly observed in African cichlids. This type of [gradual] coloration has been said to be caused by certain diets or even the parasitic cysts of shellfish. How to fix the problem either way? I've yet to find much on that topic.
Your fish looks mostly haplochromine in body shape, tall and slightly compressed laterally, and under the black pigment the likelyhood of a stripey slate grey coloration characteristis of many female and juvenile peacocks and a few other Haps. The face, however, looks to carry some mbuna characteristic. The high poll atop a flat, almost melanochromine head and the flat stop of the upper lip.
It's very difficult to get positive ID's of pure specimens of uncolored Aulonocara sp. and several other hap sp., even more difficult or impossible when your fish comes of very quastionable lineage.
Safe to call the fish a hybrid, being that it has no discerning characterstic that would pin down at least a single genera.