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Color spaces
Rec.709, P3, Rec.2020, ACES… on the CIE diagram.
What it does
Shows where each color space sits on the CIE 1931 chromaticity diagram: the horseshoe is every color the eye sees, the triangle is what the space can describe. Rec.709 stays drawn in dots for reference.
- Families: screens and broadcast (Rec.709, P3, Rec.2020…), cinema and grading (DCI-P3, ACES, DaVinci Wide Gamut), camera spaces (S-Gamut3, ARRI Wide Gamut, Cinema Gamut, V-Gamut, RED).
- The card: primaries, white point, the usual transfer curve, the area compared with Rec.709. Some camera spaces use imaginary primaries, outside the visible colors, so they never clip a real color.
The diagram is computed from the CIE 1931 table of pure colors. Your screen can’t show the colors outside its own gamut: the colors drawn there are only a hint. Primaries come from the published specs (ITU, SMPTE, AMPAS, manufacturers).
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