Pseudotropheus socolofi would be my first guess but more pics wouldnt hurt since it looks like there is a little yellow in his fins but that might be the light.
Considering you've got an 80gl mbuna tank, maybe it's a type of Mbuna?No, there's a spot on its side....Throwing this out there....a very pale Mouthbrooder, or Red Jewel? Golden Mojarra? Dunno!, ran out of ideas! More photos please?
Is it true that holding females will sometimes show blue coloration? I read somewhere that they will to scare off potential egg robbers, but haven't ever seen it.