RG color models
Red and green color space / From Wikipedia, the free encyclopedia
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An RG color model is a dichromatic color model represented by red and green primary colors. These can only reproduce a fraction of the colors possible with a trichromatic color space, such as for human color vision.
The name of the model comes from the initials of the two primary colors: red and green. The model may be either additive or subtractive. Despite its shortcomings in color reproduction, these models were used in early color processes for films.[1][2]