Typography MasterGuide

Contrast Ratio

The luminance difference between text and background colors; WCAG AA requires 4.5:1 for normal text and 3:1 for large text.

Learn more in the guide

Typography Accessibility

Related tool

Contrast Checker

Test text and background color pairs against WCAG AA and AAA.

Related terms

WCAG
Web Content Accessibility Guidelines — international standards for accessible web content, including text contrast and sizing requirements.
Readability
How easily a reader can understand written text, influenced by measure, line height, contrast, and typeface choice.