not all ob are hybrids. all ob peacocks are, but they get their pattern from mbuna that are purely their species. OB red zebras are still M. estherae, and OB labeotropheus are still labeotropheus (trewavase or fuelliborni).
sure they can be hybrids (and yours probably is) but it isn't fair or correct to say that all OB cichlids are hybrids.