Contrast Checker - WCAG Compliance Tool
Check color contrast ratios for WCAG accessibility compliance. Verify AA and AAA standards for text and UI elements. Perfect for accessible web design.
Part of Yoopla's 445+ free browser tools.
Sample Heading
This is normal text (18px). The quick brown fox jumps over the lazy dog.
This is small text (14px). The quick brown fox jumps over the lazy dog.
Contrast Ratio
WCAG Guidelines
AA Normal: 4.5:1 minimum for text smaller than 18pt (or 14pt bold).
AA Large: 3:1 minimum for text 18pt+ (or 14pt+ bold).
AAA: 7:1 minimum for enhanced accessibility.
Importance: Good contrast ensures readability for users with visual impairments.
How to Use WCAG Contrast Checker Tool
- 1
Choose text color using color picker.
- 2
Choose background color.
- 3
View contrast ratio calculation.
- 4
Check WCAG AA and AAA compliance.
- 5
See live preview of text on background.
Frequently Asked Questions
What is WCAG contrast ratio?▾
WCAG (Web Content Accessibility Guidelines) defines minimum contrast ratios for readable text. Normal text needs 4.5:1 (AA) or 7:1 (AAA). Large text needs 3:1 (AA) or 4.5:1 (AAA).
Why is color contrast important?▾
Good contrast ensures text is readable for everyone, including people with low vision or color blindness. It's legally required for many websites and improves user experience for all.
What colors have good contrast?▾
Black on white (21:1) is maximum contrast. Dark blue on white, white on dark gray, and dark purple on light yellow all work well. Avoid light gray on white or dark blue on black.
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