I've always used hikari cichlid gold ever since I first started keeping Oscars. I have no doubt that these pellets may bring out the colouration in your fish. However, I don't feed my fish on the same food every day of the week so I've never actually seen any evidence that they do you enhance the colours.
Anyway, check out the ingredients:laugh:
Ingredients: shrimp meal, white fish meal, brewer's dried yeast, wheat flour, soybean meal, wheat-germ meal, carotene, protease, thiamine mono-nitrate, riboflavin, pyridoxine hydrochloride, vitamin A, l-ascorbyl-2-polyphosphate (stabilized vitamin C), vitamin B12, biotin, calcium pantothenate, choline chloride , vitamin D3, folic acid, menadione sodium bisulfite (source of vitamin K) insitol, para-aminobenzoic acid, zinc sulfate, menadione sulfate, salt, ferrous sulfate, copper sulfate, cobalt sulfate, aluminum hydroxide, manganese sulfate