User interface themes
The interface theme defines the appearance of windows, dialogs, buttons, and all visual elements of the user interface.
Change the UI theme
In the Settings/Preferences dialog Ctrl+Alt+S, select Appearance & Behavior | Appearance.
Select the UI theme from the Theme list:
IntelliJ Light: Traditional light theme for IntelliJ-based IDEs
macOS Light or Windows 10 Light: OS-specific light theme available as a bundled plugin
Darcula: Default dark theme
High contrast: Theme designed for users with color vision deficiency
It is also possible to create your own UI themes for MPS and customize the built-in themes. For more information, see IntelliJ Platform SDK Documentation.