If you look closely at the pictures on this tub of fish food, it certainly seems to enhance the colouration of fish. In all honesty I think the colours are more the result of computer enhancement of the photo than of the food, but this is another food will help bring out the best natural colouration in your fish due to having plenty of carotenoids.
Tetra Pro Colour is also a good balanced food and a good choice for the main part of your fishes diet. It is, considered a complete diet but I personally do not consider any flake a complete diet and think it is always best to add some other foods into the mix. However I would say this and frozen bloodworm would make a perfectly adequate diet for most fish.
Although I have used this food in the past, I am currently using just the ordinary, non colour enhancing flake. I can not honestly say I saw any difference in my fishes colouration using this, but then I have been feeding a good mix of foods anyway. For those wanting to limit their foods to only one or two types, I would have no problem recommending this. As with other tetra flakes, these do not dissolve as quickly as other foods, giving the fish time to eat them before they start mucking up your water. I have also noticed some hard flakes that do not get eaten get a cheaper mix. They remind me of nothing so much as cardboard, but Tetra has none of these.
I am taking one star of my rating for this as it is more expensive than ordinary flake, and not available in the big tubs I prefer to buy, at least not where I shop. I do think the colour claims are exaggerated a bit, but I do think this will bring out the colours a bit more than plain flake. I would recommend this for a small tank with fish like neons, rams, swordtails and fighters.
Once again I would like to point out that colour feeding brightens existing colours. It does not make fish fluorescent purple, hot pink or neon green. If you see fish with these intense colours it is caused by dying, a cruel and unhealthy practice - please do not encourage this by buying them.