Most Aulonocara (peacocks) these days are hybrids, or aquarium strain (line bred) unless acquired from a specialized African cichlid source, because realization that there were many different species was a fairly recent phenom.
Many experts would have a hard time differentiating between species unless knowing the location of origination.
The non-blue ones may just be females, or no-mature males.
Agree with krichardson, too blurry to tell the others, whether they are the same species or not.