Overview

Cyan is a bright blue‑green color positioned between blue and green on the traditional color wheel. It is perceived when wavelengths associated with blue and green light stimulate the eye together, and it is commonly described as cooler and lighter than pure blue. On the color wheel, cyan sits opposite red, making it an effective complementary color for contrast in visual design. See related colors such as blue and green, and the basic arrangement of hues on the color wheel.

Properties and color systems

Cyan plays different roles depending on how color is produced:

  • In additive color (light), cyan is a secondary color created by combining green and blue light. This principle is important for displays and stage lighting; related information is summarized under light.
  • In subtractive color reproduction, especially printing, cyan is one of the four primary ink colors (CMYK): cyan, magenta, yellow and black. Printers and inks use cyan alongside magenta, yellow and black to reproduce a wide range of hues; inkjet devices and commercial presses depend on this set of pigments (inkjet printers are a common consumer example).

History and naming

The term "cyan" derives from a root referring to dark blue tones in older languages and was adopted into modern color terminology as printing and photographic processes developed. Historical photographic techniques such as the cyanotype produced images characterized by a deep cyan-blue, and this process influenced the name and cultural associations of the color.

Uses and examples

Cyan is widely used in graphic design, branding, maps, and user interfaces where a cool, calming color is desirable or where strong contrast to red is needed. Natural examples include certain bodies of water and some minerals. In everyday technology, designers adjust cyan values to control hue and saturation on screens and in print; designers often work with cyan when converting between RGB (screen) and CMYK (print) color spaces.

Distinctions and notable facts

Cyan is often confused with related blue‑greens such as aqua, turquoise, and teal; these names indicate different mixtures of blue, green and sometimes gray. Cyan’s complementary relationship to red makes it useful for color contrast, and its precise appearance varies with lighting, medium and material. For further reading on nearby colors, see blue, green and the color wheel.

For practical applications, many resources explain how cyan is reproduced in printing, displayed on screens, and perceived in different lighting conditions; manufacturers and designers consult technical guides and standards when exact reproduction is required.