This would depend on your definition of hybrid
One could say I am a hybrid of my dad and mom. Still, normally the word hybrid is used for offspring from parents from diverse species. Such as a mule
But what to do with, for instance, zebra cichlids? In 1980 they were considered as 1 species, we now have 3 or 4 or so
If I were to breed with a Guatemala male and a Nicaragua female, would I be producing hybrids?
in 1980 not, but now it would be a mixture of A nigrofasciatus with A sequia. A hybrid
Therefore, for instance when breeding Trichromus ( :) ) salvini, I think we should keep our fish pure: Only breed within a variety.
Back to your Jack Dempsey, in the year 2000 or so, 2 new species of Rocio were described. I have no personal knowledge of the differences between the species, and I certainly have no knowledge of what is kept in the USA where the blue form was made.
So what went in these fishes, and whether they are the result of hybridisation - I could not tell. I can only tell that -with or without initial hybridisation, later an intensive line breeding must have taken place