Color Contrast Checker
Test WCAG 2.1 AA/AAA contrast compliance for accessible web design
Color Contrast Checker
Live Preview
Accessible Alternatives
All contrast levels pass! No suggestions needed.
WCAG 2.1 Requirements
| Level | Normal | Large |
|---|---|---|
| AA | 4.5:1 | 3:1 |
| AAA | 7:1 | 4.5:1 |
Features
WCAG 2.1 Compliance
Tests both AA and AAA levels for normal and large text against official WCAG 2.1 guidelines
Live Preview
See your color combination in real-time with sample text at different sizes
Smart Suggestions
Get accessible color alternatives automatically when your combination fails contrast requirements
Privacy First
All calculations happen locally in your browser, no data sent to servers
How to Use?
Choose Colors
Enter foreground (text) and background colors using the color picker or HEX input fields.
Check Results
View the contrast ratio and WCAG AA/AAA compliance status for both normal and large text.
Apply Suggestions
If contrast fails, click on a suggested accessible color alternative to apply it instantly.
Frequently Asked Questions
What is the Color Contrast Checker?
A tool that tells you whether your text and background colors meet WCAG 2.1 accessibility standards. Pick two colors and instantly see if they pass AA and AAA levels for both normal and large text. If they fail, the tool suggests accessible alternatives you can apply with one click.
Why Contrast Matters
Poor color contrast is one of the most common accessibility issues on the web. It affects people with low vision, color blindness, and even users in bright sunlight. Meeting WCAG standards is not just good practice, it is often a legal requirement for public-facing websites.
How to Use It
Enter your foreground and background colors using HEX codes or the color picker. The tool instantly calculates the contrast ratio and shows pass or fail for each WCAG level. If contrast is too low, check the suggestions section for accessible color alternatives that maintain a similar look.
Tips for Designers
Test your color palette early in the design process, not after the site is built. Dark text on light backgrounds tends to work well. Avoid relying on color alone to convey information. And remember that large text (18px+ regular or 14px+ bold) has more lenient contrast requirements.
Privacy
Everything runs in your browser. No color data is sent to any server. No accounts, no tracking.