COLOR VOLUME

BT.709 vs. BT.2020

Drag to orbit. Scroll or pinch to zoom. The vertical axis is logarithmic luminance in cd/m²; the floor is CIE 1931 x and y chromaticity. Walls are vertical because any in-gamut chromaticity is reachable at low luminance, but peak luminance is only reachable at white, so the top surface sags toward the primaries.