 New theme, Classic, in Moodle 3.7 The clean and more themes, along with the hidden parent theme, Bootstrap Base, have been removed from Moodle 3.7 and replaced with the new Bootstrap 4-based Classic theme. The Classic theme is a child theme of Boost using the upstream Bootstrap 4 stable library with a general look inspired by the clean theme. It provides the Classic 3 column structure with the navigation and administration block and the choice of adding blocks to the left or right of the main content. Classic can be used as a parent theme when upgrading existing themes that are based on Bootstrap Base and require a 3 column layout and Classic navigation. The Classic theme may be customised from a theme settings page where you can, for example, change the navigation bar colour and add presets. Boost presets work with the Classic theme as they both have the same preset structure. You can add a background image and a brand colour and from the advanced settings link include raw SCSS in a similar way to with the Boost theme. To summarise, the Classic theme replaces the clean, more and hidden Bootstrap base themes and serves as a parent theme for upgrading Bootstrap base based themes.