About the Color Contrast Checker
The Color Contrast Checker is a free online tool that lets you check WCAG contrast ratio between two colors. With it you can format, encode, validate and generate code and data instantly — there's nothing to install and no account to create. Just open the tool, do what you need, and you're done.
It's part of the Developer collection on OmniTools, a growing platform of 131+ free, privacy-first tools built for speed and a great experience on every device.
Also known as: wcag, accessibility, ratio.
Why use the Color Contrast Checker?
- Runs locally in your browser
- Handles large inputs quickly
- Copy results with one click
- No rate limits or sign-up
When to use it
- Debugging APIs and payloads
- Cleaning up or formatting data
- Generating test values quickly
How to use the Color Contrast Checker
- Open the Color Contrast Checker. Open the Color Contrast Checker on this page — there is nothing to install and no account needed.
- Add your input. Type or paste your input into the tool.
- Adjust options. Choose any options you need — the Color Contrast Checker updates instantly.
- Get your result. Click the action button to download or copy your result. It is 100% free.