huelab
Sign In
Home / Tools / Color Contrast Checker

Free • no account • private by default

Color Contrast Checker

Check WCAG contrast with real previews.

Check contrast before you ship

WCAG contrast uses relative luminance to make text readable for more people.

Readable design starts here

Normal and large text preview

Contrast ratio17.61:1 Pass
AA normal4.5:1 Pass
AA large3:1 Pass
AAA normal7:1 Pass

What this tool does

Check WCAG contrast with real previews. Huelab performs the core calculation directly in your browser, so you can work without signing in or handing over your creative files.

How to use it

  1. Step 1: Select or input your color data into the tool.
  2. Step 2: Adjust the settings to fit your exact requirements.
  3. Step 3: Copy the result or export it for your project.

Built for practical color work

Use values across HEX, RGB, HSL, CMYK, LAB, and OKLCH where applicable. Values are rounded for readability while calculations use a centralized color engine for consistency.

Frequently asked questions

What is the Color Contrast Checker?

Check WCAG contrast with real previews.

Is the Color Contrast Checker free to use?

Yes, this tool is 100% free and runs entirely in your browser.