WCAG 2.1 Level A and AA, from the first commit.

Our target

This site conforms to the Web Content Accessibility Guidelines 2.1 at Level A and Level AA. Automated testing with axe-core runs in continuous integration and fails the build on any violation, so an inaccessible page cannot ship.

What that means in practice

• Every page works from the keyboard alone, with a visible focus indicator
• Text contrast meets the 4.5 to 1 minimum, and large text the 3 to 1 minimum
• Headings follow a single logical order, one level one heading per page
• Form fields carry programmatic labels and errors are announced, not only colored
• Content reflows at 320 CSS pixels and at 200 percent zoom without loss of function
• Data tables carry captions and header cells

Reporting a barrier

If any part of this site is difficult to use with assistive technology, write to us and we will respond within two business days and give a remediation date. We treat accessibility defects as defects, not as feature requests.