what is white light and list the colors which make it
However, it is also possible to make white light by combining only three colors in the spectrum: red, green, and blue. For this reason, these three colors of light are known as the primary colors. (For more on the concept of primary colors, see subhead titled Pigments.)
Light with a spectral composition that stimulates all three types of the color-sensitive cone cells of the human eye in nearly equal amounts appears white. White is one of the most common colors in nature, the color of sunlight, and the color of sunlight reflected by snow, milk, chalk, limestone and other common minerals. In many cultures white represents or signifies purity, innocence, and light, and is the symbolic opposite of black, or darkness.