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
Swiss Military TAZ 90 camouflage Swiss Military TAZ 90 camouflage Taz 90 (fr:TASS 90, Swiss Woodland) is the camouflage patterns for current standard issue battledress and service dress uniform of the Swiss Armed Forces. The four-colour pattern consists of tan, brown, green and black and is a development of the "Taz 57" and "Taz 83" (the "Alpenflage") patterns which it replaced in the early 1990s. Even so, the pattern is based on the alpenflage, but with the deletion of the white spots and the red colour found in the alpenflage, along with minor changes. It is planned to equip the Swiss Armed Forces with new