https://thenextweb.com/apple/2018/07/13/apple-brings-true-tone-to-some-external-monitors/

As an Android and Windows type of guy, I’ve been jealous of True Tone on Apple devices. The feature, which adjusts your display’s white balance to match ambient lighting, was rolled out to macOS for the first time with Apple’s new Macbooks. But it turns out its coming to external monitors as well.

As pointed out by the Verge, Apple published a support document today which lists three external displays that can use True Tone: the Apple Thunderbolt Display, the LG UltraFine 5K Display, and the LG UltraFine 4K Display.