The interface theme defines the appearance of windows, dialogs, buttons, and all visual elements of the user interface. By default, RubyMine uses the Dark theme unless you changed it during the first run.
note
The interface theme is not the same as the color scheme, which defines the colors, fonts, and syntax highlighting for various text resources: the source code, search results, and so on.
Change the UI theme
In the Settings dialog (CtrlAlt0S) , select Appearance & Behavior | Appearance.
Select the UI theme from the Theme list:
High Contrast: theme designed for users with color vision deficiency
Optionally, select a color scheme from the Editor color scheme list.
The default color scheme for the current theme is indicated in the list.
tip
Sync with OS is not yet supported on Linux. You can track the progress and leave your feedback in IJPL-54591.
Select Sync with OS to let RubyMine detect the current system settings and use the default dark or light theme accordingly. If your OS is set up to auto-switch between day and night modes, the IDE will automatically toggle between light and dark themes too.
It is also possible to create your own UI themes for RubyMine and customize the built-in themes. For more information, refer to IntelliJ Platform SDK Documentation.
Productivity tips
Use the quick switcher
Press Ctrl0` or select View | Quick Switch Scheme from the main menu.
In the Switch popup, select Theme, and then select the desired interface theme.