Color contrast

Difference in relative luminance between foreground and background. Passing one sampled pair does not establish compliance across states, overlays, gradients, and images.

Accessibility and provenance

What a page owes a keyboard, a screen reader and a fact-checker: the accessibility basics and the C2PA vocabulary for proving where a file came from.

Keyboard accessibility · Focus order · Focus indicator · ARIA · Accessible description · Reduced motion · Captions · Audio description · Status message · Content Credential · C2PA assertion · C2PA claim · Claim signature · Manifest store · Content binding · Hard binding · Soft binding · Ingredient · Trust list

← Accessible description · Reduced motion →

See it in the full glossary · 579 terms across 19 areas. Scan a site to see which of these apply to it.