How to Disable True Tone on iPhone Displays
The latest iPhone models include a feature called True Tone, which automatically adjusts the iPhone display white balance to better match the ambient lighting surrounding you. In practice this means the screen gets warmer in warm lighting, and cooler in cool lighting, sort of like how Night Shift works but not quite as dramatic and not limited only to the evening. Chances are if you have an iPhone 8 Plus, iPhone 8, or iPhone X, you’ll likely want to keep the True Tone feature enabled, but some users may want to disable True Tone on their iPhone screen.