That depends on what chameleon means exactly. Does it let you change color, is it more like a predator cloak, or is it like being an octopus, or is it more like being able to blend in through body language and pheromones and become kind of hidden, or being a social chameleon who can fit into any circumstances. It's kind of a vague word without any more description.
Shapeshifting doesn't have any limitations in this picture, so you might as well choose a form and stick to it as your new standard. The chameleon might only function as a kind of makeup, where you temporarily hide your blemishes, I'm not sure.