Serenity

This theme was part of the Moodle core distribution, but for Moodle 2.7+ has been moved to Moodle Plugins
Serenity is a fluid-width, three-column theme for Moodle 2.0. This theme is built upon both Base and Canvas, two parent themes included in the Moodle core.
Please Note:
Serenity will work in Moodle 3.2 providing you install Base theme and Canvas theme as both of these themes are needed to enable Serenity to work.