Home Theater Geeks on Gamut Rings

July 18, 2025

Home Theater Geeks explores Gamut Rings—an intuitive, volumetric approach to measuring real display color.

In this excellent new video from Home Theater Geeks, host Scott Wilkinson walks through Gamut Rings—a novel, volumetric color metric to more accurately compare real-world display performance.

Traditional xy and u′v′ gamut plots can be deeply misleading, as they ignore luminance. Gamut Rings, on the other hand, slice color volume by lightness, giving a layered, perceptually-relevant visualization. As Scott explains:

“Instead of looking at just one slice… you’re now seeing how the color gamut changes as brightness increases.”

Using real display data, the video shows how two TVs that look identical in 2D (both covering ~90% DCI-P3) are actually vastly different in volume: one hits just 51% of volumetric DCI-P3, the other 98%. That’s the kind of insight you can’t get from flat triangles on a chromaticity diagram.

Gamut Rings are already gaining traction in standards bodies, such as IEC and ICDM, and are becoming an essential tool for anyone evaluating advanced display tech—including quantum dots.