Theming Your Site Part 2: Creating a Custom Theme and Subtheme
Making your site look great is very important—to attract customers, to keep users engaged on your site, and more. This chapter dives down deep in how to knock your design out of the park, showing you how to properly approach theming in Drupal 8. In Drupal, the look of your site is referred to as the theme for your site, and you can easily switch between different Drupal themes to change the design of your site. This chapter teaches you how to create both themes and subthemes. You will create a custom subtheme using Bartik, which ships with Drupal 8, as the base theme.