Jellyfin Skin Manager is a plugin that helps you to download and install skins;
plugins/SkinManager
under the program data directory or inside the portable install directory.dotnet publish --configuration Release --output bin
plugins/SkinManager
under the program data directory or inside the portable install directoryWhen using the Nginx Reverse proxy config from the Jellyfin docs the theme might not work by default. (If you are using the subpath config, you can ignore all this.)
Because the config includes Content-Security-Policy which reduces risk of XSS, you need to add the URL from the skin repo and the fonts to the list of allowed external sources.
For example to use Kaleidochromic you need to do this
options //An array of options that will modified the skin
Some option have custom properties: