Color scientists and psychologists often use the additive primaries, red, green and blue and often refer to their arrangement around a circle as a color circle as opposed to a color wheel. Modern color circles include the purples, however, between red and violet. The arrangement of colors around the color circle is often considered to be in correspondence with the wavelengths of light, as opposed to hues, in accord with the original color circle of Isaac Newton. In a paint or subtractive color wheel, the "center of gravity" is usually (but not always ) black, representing all colors of light being absorbed in a color circle, on the other hand, the center is white or gray, indicating a mixture of different wavelengths of light (all wavelengths, or two complementary colors, for example). Intermediate and interior points of color wheels and circles represent color mixtures. Printers and others who use modern subtractive color methods and terminology use magenta, yellow, and cyan as subtractive primaries. Īs an illustrative model, artists typically use red, yellow, and blue primaries ( RYB color model) arranged at three equally spaced points around their color wheel. Others classify various color wheels as color disc, color chart, and color scale varieties. For instance, some reserve the term color wheel for mechanical rotating devices, such as color tops or filter wheels. Some sources use the terms color wheel and color circle interchangeably however, one term or the other may be more prevalent in certain fields or certain versions as mentioned above. Boutet's 7-color and 12-color color circles from 1708 File:Bezold Farbentafel 1874.jpgĪ color wheel or color circle is an abstract illustrative organization of color hues around a circle that shows relationships between primary colors, secondary colors, complementary colors, etc.