The chameleon / Iquana is real but the colors aren't. They're enhanced. They don't change color that way and not the exact color either. I know I live with them all over the place here.
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Found info that explains it from the San Diego zoo webpage.
How chameleons change color is a fascinating and complicated process. First of all, they don't really change color to match their surroundings, and they cannot change to any and all colors. For example, if a chameleon is sitting on a red-and-white polka dot tablecloth, it will not turn red and develop round white spots! Chameleons don't look at what they're sitting on and deliberately decide to match it. Instead, each species of chameleon has a group of patterns and colors that it is able to display; some of these patterns are designed for camouflage. The skin color changes under the influence of the lizard's mood, such as fear or anger, the amount of light, and the temperature or humidity. The changing skin color also plays an important role in communication among males.
