The visible light spectrum ranges from about 380 to 740 nanometers.
Photopic relative brightness sensitivity of the human visual system as a function of wavelength ( luminosity function) In primates, color vision may have evolved under selective pressure for a variety of visual tasks including the foraging for nutritious young leaves, ripe fruit, and flowers, as well as detecting predator camouflage and emotional states in other primates. Color vision is found in many animals and is mediated by similar underlying mechanisms with common types of biological molecules and a complex history of evolution in different animal taxa. Those photoreceptors then emit outputs that are propagated through many layers of neurons and then ultimately to the brain.
Color perception is a part of the larger visual system and is mediated by a complex process between neurons that begins with differential stimulation of different types of photoreceptors by light entering the eye. Colorless, green, and red photographic filters as imaged by cameraĬolor vision, a feature of visual perception, is an ability to perceive differences between light composed of different wavelengths (i.e., different spectral power distributions) independently of light intensity.
