Active camouflage the surface, so when marine animals are seen from below, they appear darker than the background. Some species of cephalopod, such as the eye-flash squid and the firefly squid, produce light in photophores on their undersides to match the background. Bioluminescence is common among marine animals, so counterillumination may be widespread, though light has other functions, including attracting prey and signalling. Color change permits camouflage against different backgrounds. Many cephalopods including octopuses, cuttlefish, and squids, and some terrestrial amphibians and reptiles including chameleons and anoles can rapidly change color and pattern, though the major reasons for this include signalling, not
Buff (colour) century, the traditional colour of formal dress boot uppers was often described as "buff". Clothing depicted on John Bull, a national personification of Britain in general and England in particular, in political cartoons and similar graphic works, has often been buff coloured. Bull's buff waistcoats, topcoats, trousers and boot uppers were typical of 16th- and 17th-century Englishmen. Buff is a traditional European military uniform colour. Buff has good camouflage qualities as sand, soil, and dry vegetation are buff in many areas. The term "buff coat" refers to a part of 17th-century European military uniforms. Such coats were intended to protect