Did a quick search-through and didn't see anything about this, so I'll just throw out my pet "factoid" (I'm still not sure how this is still a little-known fact, since they're decently popular pets); Kecleon notwithstanding, the whole camo-chameleon thing really isn't a thing for the most part. Cuttlefish, octopus, flounders, sure -- they deserve way more credit for their mad blending-in skills. They can change color, pattern, sometimes even texture, or use nearby materials to help break up their outline -- they're the deer hunters of the marine world. Chams, on the other hand, would be the stereotypical hippies; their colors are more the mood ring/personal aura type. Whether it's on a tree branch or a chessboard, a cold or scared chameleon will probably be rocking its one personal variant of green-gray camo, while when warmer or excited it "fires up" to a much more stunning "chameleon-y" looking color/pattern. Both vary based on species, region and gender, but not on the surrounding colors. They're no less cool for it (nor are true color-swappers), but apparently it's one of the more stubborn mistaken identities of the animal world!