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 battledress and service dress after the year 2020 Minor changes in the camo pattern could be expected. In 2006, the Taz was changed to Velcro insigna and Velcro name tabs (Taz 90/06). A slightly altered new MultiCam design ("Multiumfeldtarnmuster 16") will be introduced in 2022. 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