Free Web Toolbox

Designers and frontend developers

Color Contrast Checker

Check contrast ratio between text and background colors.

Instructions: Enter your values, review the instant result, then sign up to save the tool.

contrast ratio

Enter values to calculate.

Instructions

  1. Enter the numbers or text for your situation.
  2. The result updates instantly in your browser.
  3. Sign up to save this tool to your favorites.

Good for

Contrast Checker

Use this tool when you need a quick answer for color contrast checker. Enter your details, compare the result, and adjust the inputs until the numbers match your situation.

Use it well

  • Check real text over real backgrounds.
  • Large text has different thresholds.
  • Do not rely on color alone for meaning.

Check text and background color contrast ratio for readability. This tool helps designers and developers avoid low-contrast combinations before publishing. Helpful for color contrast checker, free contrast checker, online contrast checker, design calculator, quick estimate, planning tool, browser calculator, and practical everyday comparisons.