Understanding WCAG Contrast Ratios
The Web Content Accessibility Guidelines (WCAG) require sufficient contrast between text and its background so that users with visual impairments or varying screen conditions can read comfortably.
- Level AA: Requires a minimum contrast ratio of 4.5:1 for normal body text and 3:1 for large text (18pt or 14pt bold).
- Level AAA: The enhanced standard requiring at least 7:1 for normal text and 4.5:1 for large text.