Core themes

Claro theme

A new administration theme for Drupal

• Contributing to Claro
• Development
• Claro CSS coding standards
• Design
• Accessibility

Olivero

Olivero is a core theme and the new default theme for Drupal starting with version 9.4.0

• How to contribute to Olivero
• Development Setup
• Authoring CSS for Olivero

Stark theme

Information about stark theme in Drupal 8

Starterkit theme

Starterkit theme is a command line tool that allows theme developers to easily start a new theme.