The Hisense U6K has an excellent color gamut, and it displays a wide range of colors with HDR content.
Unfortunately, the tone mapping is average with content mastered at a high brightness level, so some colors appear off. The results here are with a 75% stimulus corresponding to 1,000 cd/m² content. With dimmer content, the tone mapping is significantly better, as shown with this color gamut measured with a 50% stimulus instead, which corresponds to roughly 92.2 cd/m².
Overall, this means that the majority of HDR content is displayed well, with vivid colors that are displayed properly and accurately. Very bright scenes, however, are less accurate, as the TV sacrifices accuracy to reach the brightest highlights it can display. The measurements above are in the ‘Native’ Color Space as it’s more accurate than ‘Auto’.
The TV’s color gamut changes as the window size changes. This impacts calibration readings, but for most people, this isn’t an issue as the vast majority of content takes up 100% of the screen. You can see how the color gamut changes with the window size here.
