Check color contrast ratios against WCAG 2.1 guidelines instantly. Ensure your text is readable and your design is accessible to everyone. Free and easy to use.
Make your content usable for the 1 in 12 men and 1 in 200 women with color vision deficiency, as well as those with low vision.
Good contrast improves readability for everyone, especially on dim screens or in bright sunlight.
Requires 4.5:1 for normal text, 3:1 for large text. The standard goal for most websites.
Requires 7:1 for normal text, 4.5:1 for large text. Enhanced accessibility for users with significant vision loss.
This contrast checker runs entirely in your browser. No data, colors, or information is sent to our servers.
Contrast Checker is most useful when it sits inside a small repeatable workflow: prepare the source, make the change, then check the output before sharing it.
Use Contrast Checker for this job: Check color contrast ratios against WCAG 2.1 guidelines instantly. Ensure your text is readable and your design is accessible to everyone. Free and easy to use. It keeps the task in the browser without moving the work into a heavier desktop app.
Preview the result, compare it with the original, and repeat the settings until the file is ready for a real project.
For adjacent tasks, stay inside the color tools collection instead of opening another service.
Related workflow links
Learn the fundamentals of web accessibility and color contrast. Understand WCAG ratings (AA vs. AAA) and use our quick checks and practical fixes to make your UI readable for everyone.
Your logo is a goldmine of color information. Learn how to extract key colors from your logo and expand them into a full, versatile brand palette for your website, social media, and marketing materials.
Color contrast is the difference in brightness between a foreground color and its background. High contrast ensures that people with visual impairments can perceive your content effectively.
No, the WCAG guidelines provide exceptions for text that is part of a logo or brand name, as well as text that is purely decorative or part of an inactive UI component.
Increase the difference in luminance. Make the light color lighter or the dark color darker. Use our live preview to experiment.