Summary: Three “wide-gamut” RGB color spaces — AdobeRGB, DCI-P3, and Rec. 2020 — are compared to the gamut of real surface colors (Pointer’s gamut) and the optimal color solid (MacAdam limits). Only Rec. 2020 covers Pointer’s gamut completely, or very nearly so, at all luminance levels examined. Rec. 2020 also approaches or exceeds the MacAdam limits in all color regions at high luminance (L* ≥ 80). Better coverage of the MacAdam limits at lower luminance levels will most likely require multi-primary displays.
Key words: Pointer’s gamut, MacAdam limits, surface colors, optimal colors, AdobeRGB, DCI-P3, Rec. 2020, wide-gamut displays, Rec. 2020-to-XYZ conversion matrix, DCI-P3-to-XYZ conversion matrix.