Color Contrast Checker

Check color contrast online free — verify WCAG AA and AAA compliance for text and background colors. Ensure accessibility. Browser-based.

Free online color contrast checker that tests contrast ratios between two colors against WCAG 2.1 accessibility standards (AA, AAA). All processing in your browser — no server communication. Essential for web accessibility compliance and UI design validation.

Foreground
Background
21.00:1
Contrast Ratio
Normal Text
AA (4.5:1)Pass
AAA (7:1)Pass
Large Text
AA (3:1)Pass
AAA (4.5:1)Pass
Preview

The quick brown fox jumps over the lazy dog 1234567890

The quick brown fox jumps over the lazy dog 1234567890
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How to use Color Contrast Checker?

  1. Enter foreground (text) and background colors.
  2. Check the contrast ratio and WCAG grade (AA/AAA).
  3. Adjust colors as needed to meet standards.

Frequently asked questions about Color Contrast Checker

What is the difference between WCAG AA and AAA?

AA requires 4.5:1 for normal text and 3:1 for large text. AAA is stricter at 7:1 and 4.5:1 respectively.

What if my contrast ratio doesn't pass?

Adjust colors lighter or darker to increase contrast. The tool shows results in real time as you adjust.

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