Dark mode

In macOS Mojave and later, you can enable Apple's Dark Mode, a darker color palette for all screens, views, menus, and controls.

Select System Preferences > General > Dark. The product reflects it automatically.

Dark Mode helps to protect your vision. The color palette in Dark Mode includes darker background and lighter foreground colors. Greater contrast between content and the background user interface improves legibility.
Note: Dark Mode cannot be applied to the content of widgets. You can set Dark Mode as your default interface style.