Apple recently rolled a software update — tvOS 14.5 — to its streaming boxes, both Apple TV HD and Apple TV 4K, giving them the ability to optimize the color balance of your TV. In a nutshell, you can ...
Head over to System Preferences and then General. Under Appearance, you’ll now see an option for Accent color. By default this is blue, but you can change it to one of the 7 other options available.