Q
what pigment is true red
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The pigment responsible for "true red" is somewhat subjective, as it depends on the context (art, printing, or natural pigments) and the specific shade of red being referred to. However, in artistic painting, Cadmium Red, made of cadmium sulfide and selenium, is often considered a pure, vivid red pigment that artists value for its opacity and strong color. Cadmium Red comes in several shades, but the medium hue is closest to what many consider a "true red." In digital color reproduction (such as printing), "true red" might refer to a shade without any green or blue components, defined in RGB values as (255,0,0). For natural pigments, vermilion, historically made from cinnabar, has also been described as a "true red," used since antiquity for its bright, bold hue.
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