redgreen

Redgreen is a term used informally to describe the relationship or combination of red and green colors across design, signaling, and digital imaging. It is not a formal scientific category but a shorthand that appears in multiple disciplines to discuss how these two hues interact and convey information.

In color theory and visual design, red and green are distinct hues that provide high-contrast cues. In additive color systems such as RGB, red and green are separate channels that combine with blue to form the color spectrum. Because they are highly perceptible, they are commonly used for status indicators, alarms, and navigation aids, though care is needed for color-blind audiences.

Accessibility guidance discourages relying solely on redgreen cues to communicate meaning. Many interfaces pair color with textual labels, icons, or patterns to ensure information remains accessible to people with red-green color vision deficiencies.

In imaging and computer graphics, redgreen often appears as a reference to the red and green channels of RGB data. It can describe processing steps such as channel separation, thresholding, color correction, or chroma-keying where green is used to remove a background.

Historically, the term is a generic descriptor rather than a formal concept, used wherever people discuss combinations or contrasts of red and green hues. Related topics include the RGB color model, red-green color blindness, and accessibility in design.