The TV has an amazing color gamut. Like most TVs in this market range, the LG C3 has nearly perfect coverage of the DCI-P3 color space, which most current HDR content uses. However, when displaying very bright images, its color accuracy is off; it struggles with displaying accurate greens, and all colors are generally undersaturated. Its tone mapping is also off, like on the LG C2 OLED, struggling with accurately tone mapping desaturated colors. Note that these results are done with the TV receiving a near 1000 nits stimulus signal; in actual usage the TV’s color accuracy and tone mapping is much better, as our results here amount to a stress test.
The TV also has good coverage of the Rec. 2020 color space used by some content. Still, it can’t display the full range of green or cyan; colors are again generally undersaturated, and its tone mapping still struggles with desaturated colors. Overall it isn’t the best TV for viewers who are really into HDR color accuracy, but otherwise, it looks great.