Color Contrast Checker
Color Contrast Checker — check the WCAG contrast ratio between two colors. It works entirely in your browser, with nothing uploaded to any server.
Color Contrast Checker is a browser-based web developer tool on WebDevToolsBase. Color Contrast Checker — check the WCAG contrast ratio between two colors. It works entirely in your browser, with nothing uploaded to any server. To use it, paste your input and view the result directly in your browser — no signup and nothing to install.
Color Contrast Checker is a free Color Tools utility that runs entirely in your browser — nothing you enter is uploaded.
How to use Color Contrast Checker
- Choose the foreground text color.
- Choose the background color.
- Review the contrast ratio and the normal- and large-text AA/AAA results.
- Use Copy to copy the contrast analysis.
About this tool
Color Contrast Checker calculates the contrast ratio between the chosen foreground and background colors.
The result compares the color pair with normal- and large-text AA and AAA contrast thresholds. Passing this check alone does not establish page-wide accessibility.
Frequently asked questions
How do I use Color Contrast Checker?
Color Contrast Checker calculates the contrast ratio between the chosen foreground and background colors.
Does Color Contrast Checker cost anything?
No — Color Contrast Checker is completely free, with no sign-up and no hidden limits.
Is my input private in Color Contrast Checker?
Yes — your input never leaves your device; Color Contrast Checker does all the work in your browser.
What result does Color Contrast Checker provide?
It outputs a contrast ratio and normal- and large-text AA/AAA threshold results. It does not output color-format conversions.
Can I use Color Contrast Checker without a connection?
Yes — after the first load Color Contrast Checker runs entirely offline.