Chameleon turquoise, and purple. Chameleon skin has a superficial layer which contains pigments, and under the layer are cells with guanine crystals. Chameleons change colour by changing the space between the guanine crystals, which changes the wavelength of light reflected off the crystals which changes the colour of the skin. Colour change in chameleons has functions in camouflage, but most commonly in social signaling and in reactions to temperature and other conditions. The relative importance of these functions varies with the circumstances, as well as the species. Colour change signals a chameleon's physiological condition and intentions to other chameleons. Chameleons tend
Dazzle camouflage testing period, the Red Bull RB11 car was painted in a scheme intended to confound rival teams' ability to analyse its aerodynamics. The designer Adam Harvey has similarly proposed a form of camouflage reminiscent of dazzle for personal camouflage from face-detection technology. It attempts to block detection by facial recognition technologies such as DeepFace "by creating an 'anti-face'". It uses occlusion, covering certain facial features; transformation, altering the shape or colour of parts of the face; and a combination of the two. The Sea Shepherd Conservation Society has used dazzle patterns on its fleet since 2009. Dazzle camouflage Dazzle camouflage,