Stark

The Stark theme is provided for demonstration purposes; it uses Drupal’s default HTML markup and CSS styles. It can be used as a troubleshooting tool to determine whether module-related CSS and JavaScript are interfering with a more complex theme, and can be used by designers interested in studying Drupal’s default markup without the interference of changes commonly made by more complex themes.

To avoid obscuring CSS added to the page by Drupal or a contrib module, the Stark theme itself has no styling, except just enough CSS to arrange the page in a traditional “Header, sidebars, content, and footer” layout.

Stark theme was ported to Drupal 8 as a core theme.