OBS Studio has the ability to load different themes based on your needs. The option is available in Settings -> General or Settings -> Appearance in OBS 30.2 and onwards.

The default themes included with OBS include:

• Yami - Current primary theme of OBS Studio, designed by Warchamp7
• Acri - Designed by Warchamp7
• Dark - The old theme since OBS 21.0
• Grey - A greyscale version of Yami
• Light - A light version of Yami
• Rachni - Designed by Fenrir

The files for the default themes can be found in the OBS Studio installation directory, specifically /data/obs-studio/themes/

The best place to install custom themes is in your user directory - the same place where profiles and scenes are stored, so that if you ever reinstall OBS Studio, you don't lose your custom themes.

• Windows: WinKey+R > %APPDATA%\obs-studio\themes\
• macOS: Cmd+Shift+G > ~/Library/Application Support/obs-studio/themes/
• Linux: ~/.config/obs-studio/themes/

You may have to create the themes directory yourself. You can find themes created by members of the community at this link.

Themes use a combination of something called QSS and a folder of custom images.

QSS is based on a subset of CSS2, and its documentation is all over the place. It's recommended to open one of the default themes and use it as a reference.

Documentation for QSS is split up quite heavily, but here are the links you will need:

• The Style Sheet Syntax - covers the basics on how to write QSS
• Qt Style Sheets Reference - lengthy documentation on which widgets can be customized, and how, including pseudo-states and sub-controls

As of version 30.2 of OBS Studio, we have added a pre-processing step to QSS to add additional functionality to themes. Learn more about the OBS Studio Theme System