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
Disruptive Pattern Camouflage Uniform includes Browning high power shoulder holsters, pre-land 125 tactical vests, trial chest rigs, SAS patrol chest rigs and vests, SF armour carriers and pouches (early 2000s). Private companies also produce body armour carriers, pouches, packs etc. in DPCU, DPDU and DPNU, most notably Platatac and Sord. Disruptive Pattern Camouflage Uniform Disruptive Pattern Camouflage Uniform (DPCU), also nicknamed Auscam or jelly bean camo is a five-colour military camouflage pattern used by the Australian Defence Force. It was developed and tested during the late 1970s and early 1980s. The DPCU has been replaced in the Australian Army by the Australian Multicam Camouflage