RGBlike

RGBlike is a term used in color science and computer graphics to describe a color representation that resembles the familiar Red-Green-Blue (RGB) model but is defined with alternative parameters or constraints. It is not a single standardized color space; rather, RGBlike refers to a family of RGB-like schemes used in software, hardware, or research where the basic idea of three primary channels labeled red, green, and blue is preserved, but the exact primaries, gamma, or sampling may differ from the canonical sRGB or Rec. 709.

In RGBlike systems, the three channels are typically independent components that encode color information in a potentially different color gamut and with a distinct transfer function. The primaries may be shifted, broadened, or narrowed to reflect device characteristics or perceptual aims. The transfer function can be linear or nonlinear, and the overall pipeline may involve color management to map RGBlike values to display-referred spaces. Because RGBlike is not standardized, implementations vary and careful specification is required to ensure interoperability.

Common uses include image processing tools, game engines, and shader code where a simple three-channel representation is preferred but exact color properties must be specified beyond a generic RGB label. RGBlike can also serve as a pedagogical concept for discussing how small changes to primaries or gamma affect perceived color.

See also: RGB, color space, color management, sRGB.