As an inclusive community, we are committed to making sure that Drupal is an accessible tool for building websites and that Drupal helps you create websites that are themselves accessible.
This initiative started with advancements with Drupal 7 accessibility. We have committed to ensuring that all features of Drupal core conform with the Worldwide Web Consortium (W3C) guidelines: WCAG 2.0 and ATAG 2.0. Where possible we will also update the previous version of Drupal core, version 6, to enhance its accessibility.
Accessible Features in Drupal