Installing a theme is as simple as copying the corresponding CSS into the ‘themes’ folder of your tt-rss and then activating
it in Preferences.
Third party themes are automatically disabled if tt-rss version changes, in this case theme CSS file needs to
be updated: replace previous version code in supports-version:X.Y with VERSION_STATIC (i.e. the version you see at the bottom of Preferences, excluding git commit information).
Please note that we’re not responsible for third party themes. Use at your own risk.
Themes and plugins are also available on the forums. This is not necessarily a complete list.
Third party themes master list
Clean GReader Theme
A theme built from scratch, independent of default css. Inspired by the
Google Reader it has a white/greyish look.