Color Contrast Checker

About WCAG Contrast Requirements

The Web Content Accessibility Guidelines (WCAG) 2.1 define minimum contrast ratios to ensure text is readable by people with moderately low vision.

• AA Normal (4.5:1): Required for body text under 18pt (or 14pt bold). The baseline for most web content.
• AA Large (3:1): Required for large text — 18pt+ regular or 14pt+ bold. Easier to read at lower contrast.
• AAA Normal (7:1): Enhanced contrast for body text. Recommended for critical content and long-form reading.
• AAA Large (4.5:1): Enhanced contrast for large text. The gold standard for accessible headings.