Color is the visual perception of light. The human eye perceives color through cone cells in the retina that are sensitive to different wavelengths of light. There are three color channels - red-green, blue-yellow, and black-white - that transmit color information from the eye to the brain. Some people have deficiencies in their cone cells that cause them to perceive fewer colors than others. Color comes from light and can appear more intense with brighter light. Artists use pigments combined with other materials to create the colors in paints, crayons, and other media. Different colors have symbolic meanings derived from nature, culture, religion, and other sources.