Writing a new theme

Note: Currently personal themes are not officially supported and may be overwritten when updating. Be sure to keep backups!

As of writing (02-02-2021), support for themes as extensions is under development.

The easiest way to create a theme is by copying and modifying the base theme (or another of the pre-installed themes). The base theme can be found in /p/themes/base-theme. Themes require:

“_template.css” is normally added to the metadata file as a fallback for missing aspects. The file is taken from the base theme. If submitting a pull request for a theme, please know that pull request themes must include this file.

RTL Support

RTL (right-to-left) support for languages such as Hebrew and Arabic is handled through CSSJanus. To generate an RTL CSS file from your standard file, use make rtl. Be sure to commit the resulting file (filename.rtl.css).

Overriding icons

To replace the default icons, add an “icons” folder to your theme’s folder. Use files with the same name as the default icon to override them.

Template file


  "name": "Theme name",
  "author": "Theme author",
  "description": "Theme description",
  "version": 0.1,
  "files": ["_template.css", "file1.css", "file2.css"]

An example of a css theme file can be found at /p/themes/base-theme/base.css