there is something to be said about tank parameters too. Alot of corals fade in captivity due to nutrient issues and feeding regimen. I have a true orange wall hammer. It looked better when I got it in the mail, and its taken time to adjust to my aquarium's parameters. Its always been orange though. I have a paraancora and a paradivisa coming from blue glow as well. I got a yellow hammer from Mike and it was always very yellow, another one i got was more gold, but its purple underneath so I'm fostering that 'lakers' combo in lower light. Where you place a coral makes a big difference too. I've had two corals from the same colony look incredibly different due to location.