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A line between 90 (green yellow) and 270 degrees can be used to broadly demarcate warm colors from cool colors colors on the right (towards red) are warm while colors on the left (towards cyan) are cool. Determining whether one color is warmer or cooler than another can be measured by their proximities to these poles. Think of the color wheel as a clock where every hour marks a new color family.Ībsolutely warm and cool colors can be found at 0 (red – no warmer color) and 180 (cyan – no cooler color) degrees. While every degree represents a new hue, you can use broader terms to describe a color family red, orange, yellow, etc. A circle has 360 degrees, so the scale is 0 – 359. When using the language of HSL, hue values mark a position measured in degrees on a color wheel. The language of HSL (hue, saturation, luminosity) is a very precise language. The more precise a language is the more useful it is. Using the qualities of one sense (touch) to describe the qualities of another (sight) can be a tenuous affair and may lead to ambiguity and confusion. This is due in large part to our physical environment – water is blue, plants are green, sunshine is yellow, fire is red. These associative qualities of color with regard to temperature are almost universally accepted.

Psychologically, blue is cooler than red. There are also psychological qualities of color linked to temperature. When it comes to light sources, physically, blue is warmer than red. As the physical temperature of the object rises, color transitions from red (long wavelengths – low energy) to blue (short wavelengths – high energy) through ROYGBIV (red, orange, yellow, green, blue, indigo, violet). The color temperature of light (Kelvin degrees) is determined by measuring a black body radiator (an object heated so that it emits light). There are physical characteristics of color linked to temperature. Understanding and exploring the dynamics of temperature in color can benefit any visual artist. Temperature can be used to elicit psychological responses within the viewer.

Temperature can be used to enhance spatial relationships within an image. Temperature can be used to attain a color balance. An essential quality of color is temperature.