Share themes consist of a directory containing a CSS and images files, and they can be located in the theme directory (<TOMCAT_HOME>/webapps/share/WEB-INF/classes/alfresco/site-data/themes). The default theme is called default.xml.
The following themes are available:
- Blue theme (default)
- Light theme
- Yellow theme
- Green theme
- High contrast black
- Google Docs theme
The default theme, which comprises the CSS and image assets used across all pages, displays in a new installation.
You can also create your own themes. Take a look at the Adding a custom Share Theme tutorial.