Color contrast
Difference in relative luminance between foreground and background.
What Color contrast does not show
Passing one sampled pair does not establish compliance across states, overlays, gradients, and images.
Where Color contrast comes up on this site
- How to test text color contrast on hover and keyboard focusMost contrast checks measure a page at rest.
Related terms in 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 · landmark · contrast ratio
Questions about Color contrast
What is Color contrast?
Difference in relative luminance between foreground and background.
What does Color contrast not show or guarantee?
Passing one sampled pair does not establish compliance across states, overlays, gradients, and images.
Which area of the glossary does Color contrast belong to?
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.
← Accessible description · Reduced motion →
See it in the full glossary · 731 terms across 19 areas.