Why are my Kenyi cichlids changing color?

Paco

New member
So the other day i bought 3 female (supposedly) kenyi cichlids. They are all about 2 inches long. all are blue, one had much more faded bars than the other ones which had vivid blue and black coloring. One of the contrasting black and blue ones just recently faded to grayish bars like the other one. Are they just males changing to their yellow?
 
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