Taken right from the site:
Coral Photos
All coral and other livestock photos are taken under 1000 and/or 400 Watt 20K XM bulbs with a high-quality digital camera, and accurately represent the item in our tanks. We do not "photoshop" our corals (an unfortunately common practice) to make them look better then they are.
Please note that corals WILL look different from our photos under 10K bulbs or other types of lighting. We highly recommend the use of 20K Metal Halide bulbs for the best health and coloration of corals.
Coloration is also dependent on shipping stress, water quality and other tank parameters we have no control over - so we can't guarantee an exact color match in your tank. Rest assured however that as long as you have a clean and stable tank, most corals will retain or regain their coloration.