Check foreground and background color contrast for WCAG AA and AAA compliance with suggestions. The Color Contrast Ratio Checker is one of 900+ free developer tools on Toolblip - all open to use without a signup.

Open the Color Contrast Ratio Checker on this page, paste or upload your input, and the result updates as you type. Use the copy button to grab the output, or adjust options to tune the result. Nothing you enter leaves your browser.

Yes. The Color Contrast Ratio Checker is a free online tool on Toolblip - no signup, no account, no hidden usage limits. It runs in your browser and works on desktop and mobile.

Yes. The Color Contrast Ratio Checker processes your data entirely client-side, so nothing you paste is uploaded or stored on any server. It's safe to use with internal snippets, private keys for debugging, or any other sensitive content you'd rather not send to a remote service.

The Color Contrast Ratio Checker works with the formats web developers reach for every day - HEX, RGB / RGBA, and HSL. You can copy any value with one click for use in CSS, design tools, or code.

Once the page has loaded, the Color Contrast Ratio Checker continues to work without an internet connection. Bookmark this page and return to it anytime - all logic runs locally.