cant be sure if they are colour fed, but i dont think so. got all this photos from a Dutch forum. it got to do with water chemistry and quality food....and mat salleh attitude. what i mean is these are expensive fishes over there and mat sallehs usually take care of their investments.
the owner of the photos said he fed his cichlids with Aquamaster, an expensive protein loaded pellet. i tried it with my blackbelts, theres some result especially around the throat area, bright red....but then its rather expensive and cichlids never eat enough.
if we want to consider feeding such pellets means colour fed than they are.
but seeing these photo makes me determine to find out ways to improve my water quality.

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Everyone Has a Photographic Memory..........some just dont have film!