gray

Gray is a color seen commonly in nature. In pigment, or subtractive color (CMYK), it is created by adding black. In light, or additive color (RGB), it is created by adding equal amounts of R, G, and B, with values below 255. Depending on the color temperature of the light (measured in degrees Kelvin of a black body radiator), the human eye can interpret the same object as either gray or some other color, with colder light adding a yellow-orange hue and warmer light adding a blue hue.

Two colors are called complementary colors if gray is produced when lights of the two colors are combined. The psychological complementary colors are:

• Black and White
• Blue and Yellow
• Red and Green

Other sets of complementary colors include:

• Orange and Azure
• Lime and Purple
• Jade and Fuchsia

• Payne's gray
• Davy's gray