Colour Wheel

A colour wheel or colour circle is an organization of colour hues around a circle, showing relationships between colors considered to be primary colours, secondary colours, complementary colours, etc. Artists typically use red, yellow, and blue primaries (RYB color model), so these are arranged at three equally-spaced points around their colour wheel.[1] Printers and others who use modern subtractive colour methods and terminology use magenta, yellow, and cyan as subtractive primaries. Colour scientists and psychologists often use additive primaries, such as red, green, and blue, and often refer to their arrangement around a circle as a colour circle, as opposed to a colour wheel.[2] The arrangement of colours around the colour circle is often considered to be in correspondence with the wavelengths of light, as opposed to hues, in accord with the original colour circle of Isaac Newton. Modern colour circles include the purples, however, between red and violet.