Camouflage

Non-military applications
Hunters often use camouflage clothing that is visually tailored to the game they are hunting. The most striking example of this is the blaze orange camouflage, which makes the hunter obvious to humans but relies on the fact that most large game animals, such as deer, are dichromats, and perceive the orange as a dull color. On the other hand, optical brighteners, commonly used in laundry detergents to make the laundered items appear brighter, are visible to many game animals; using these will cause what appears to the human eye to be cryptically colored clothing to stand out against the background, when viewed by an animal with ultraviolet-sensitive eyes.
There are several different types of hunting camouflage. The use of each one is dependent upon the area in which the hunter is going to hunt. It can range in appearance from a mossy oak pattern to a sage brush pattern for hunters of large mammals. Waterfowl hunters can have camouflage that resembles swamp reeds.