Color Contrast Checker
Instant WCAG 2.2, ADA & Section 508 compliance analysis
Live Contrast Checker
Aa
21 : 1
WCAG AA
WCAG AAA
Color-blindness simulator
What is a Color Contrast Checker & How Does It Help You?
Imagine 15 % of your visitors leave your site because they literally can’t read the text. That’s the reality when color contrast is too low for people with low vision, color-blindness, or who are simply reading on a sunny balcony.
A Color Contrast Checker is a free web tool that measures how well two colors stand out from each other. It uses the official formulas from WCAG 2.2 (Web Content Accessibility Guidelines) to give you a simple pass-or-fail score for both AA and AAA levels. It also simulates how your palette looks to people with the eight most common types of color-vision deficiency.
How to use this tool (30-second guide)
- Pick or paste any foreground and background color.
- Read the live ratio (e.g., 4.5 : 1).
- Green badge = WCAG AA compliant. Gold badge = AAA compliant. Red = needs adjustment.
- Click “Swap” or “Random” for quick experimentation, then “Export” to save the palette as CSS variables.
Benefits for beginners & pros
- Better UX – Readable text keeps visitors longer.
- Legal safety – Meets ADA & Section 508 requirements.
- Faster design – No manual calculations or external apps.
- SEO boost – Accessibility is now a ranking factor.
- Client trust – Show instant proof that your site is inclusive.
Ready? Start experimenting with the tool above and make your next project accessible to everyone.