Free tool

Contrast Checker: Test WCAG Color Accessibility

Check text and background color combinations against WCAG contrast standards in seconds.

Not every site is easy to read. Light gray text on a white background, pale buttons, thin fonts over busy photos — these choices look fine to the person who picked them, but they exclude visitors with low vision, color blindness, or anyone squinting at a phone outdoors. This contrast checker measures the exact ratio between your text and background colors and tells you whether it meets the WCAG accessibility guidelines (AA and AAA levels), so you can fix problems before customers hit them.

It takes seconds: enter two colors, get a pass/fail result, adjust until it's right. It's a small check with real impact — better readability keeps visitors on the page longer and reduces the risk of accessibility complaints. If you want a broader look at how your site performs beyond color, our team can review your whole website for usability and technical issues, or you can start with a free 48h check-up.

How to use it

  • Enter or pick your text color and your background color (hex codes or the color picker both work).
  • Read the contrast ratio and see instantly whether it passes WCAG AA and AAA for normal and large text.
  • If it fails, adjust either color until you get a pass, then copy the final hex codes into your site or design files.

Need a hand beyond the tool? See the related service or get the free 48h Check-up.

Frequently asked questions

What is a good contrast ratio for WCAG compliance?
WCAG 2.1 AA requires at least 4.5:1 for normal text and 3:1 for large text (18pt+ or 14pt bold). Level AAA is stricter, requiring 7:1 for normal text and 4.5:1 for large text. Most businesses target AA, since it's the standard referenced in most accessibility laws and audits.
Why does color contrast matter for a business website?
Low contrast makes text hard to read for people with low vision, color blindness, or anyone using a phone in bright sunlight. It also affects legal exposure in some regions, since accessibility standards are increasingly cited in web accessibility complaints. Fixing contrast is usually a quick change that improves usability for every visitor, not just those with disabilities.
Does passing WCAG contrast guarantee my site is accessible?
No. Contrast is one important piece of accessibility, but a fully accessible site also needs things like proper heading structure, keyboard navigation, alt text, and readable forms. This tool helps you fix one common and high-impact issue; a full accessibility review looks at the rest.

A tool is a start. Enquiries are the goal.

In the free 48h Check-up we look at your case and tell you, data in hand, where to start.

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