maxRGB

MaxRGB is a term used in color science and computer graphics to denote a conceptual linear RGB color space used for analysis and processing, rather than a standardized device-specific space. In this encoding, the color channels R, G, and B are linear values typically in the range [0, 1], and the scale is defined so that the largest of the three components is set to 1.0. This normalization makes it convenient to discuss gamut limits, clipping, and dynamic range independent of any particular display primaries.

MaxRGB is not a formal standard with fixed primaries or a universal transfer function. Rather, it serves as a mathematical reference space for describing operations such as gamut mapping, linear-to-display transformations, and scene-referred workflows. Because it represents colors without committing to a particular device’s gamut, maxRGB can simplify reasoning about how colors will behave when moved between spaces or when subjected to fusion of multiple sources.

In practice, maxRGB often appears in discussions of high-dynamic-range (HDR) rendering, color management, and pipeline design. When converting from a maxRGB-like representation to a device-referred space (for example sRGB, Display P3, or Rec. 2020), color scientists apply appropriate matrices and transfer functions to map to the target gamut and gamma characteristics. The exact reference values and scaling can vary by source, reinforcing that maxRGB is best understood as a flexible, conceptual tool rather than a single, canonical color space.

See also: color space, linear RGB, gamut, ICC profile, color management, gamma correction.