In Moodle, the theme determines the colors and font styles that your site uses. To choose a theme, select Site Administration | Appearance | Themes | Theme selector. The choices you see there are standard themes that come with Moodle. On your server, you will find the files for these themes in /theme. Compare the theme names available in the Themes page with the directories you see on the server:

Instead of modifying a standard theme, duplicate the theme that is closest to what you want, and modify the duplicate. Also, check http://moodle.org/ for other themes that you can use. For example, the theme called Kubrick gives Moodle a look similar to the default installation of the WordPress blogging software. With this theme, your site is hardly recognizable as a Moodle site.

The following sections show you how to achieve some of these customizations.