Custom themes


Since JabRef 5.2 it is possible to use custom themes. In Preferences > Appearance > Visual theme the themes in general can be changed. Themes are just CSS files defining the look of the UI.
  • Light Theme: The default theme is the light theme (Base.css).
  • Dark Theme: There is an alternative dark theme (Dark.css) which is based on Base.css and just overwrites the colors.
  • Custom Theme: In Preferences > Appearance > Visual theme > Custom theme there can be set a custom theme by simply selecting a custom CSS (based on Base.css or Dark.css), for instance:
You can find a collection of user contributed themes at https://themes.jabref.org.
dark-custom (2) (1).css

Selection of Useful CSS selectors

UI element
CSS selector
preview box
{} biblatex source tab
text in {} biblatex source tab
.code-area .text


Light Theme
Light Theme
Dark Theme
Dark Theme
Custom Theme
Custom Theme
(based on the Dark Theme)

Known bugs

  • #8523: On Windows 10, it is not possible to use fonts that were installed user-wide in the CSS, only system-wide fonts are working. A workaround to use fonts that are not installed system-wide is to include the font file via @font-face.