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Color Contrast Checker

Check foreground/background contrast against WCAG 2.x AA and AAA thresholds.

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Browser workspace

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A quick start

How to use it

  1. Enter solid foreground and background HEX colors.
  2. Review the contrast ratio and pass/fail thresholds.
  3. Adjust the colors and test your real interface.
Examples, details, and limitations
Before you go

Common questions

How do I use the color contrast checker?

Enter solid foreground and background HEX colors. Review the contrast ratio and pass/fail thresholds. Adjust the colors and test your real interface.

What should I check before using the result?

This calculates contrast for opaque sRGB colors. It does not assess gradients, images, font rendering, focus behavior, or full accessibility compliance.

Is my input stored or uploaded?

No. Tool input stays in browser memory and is not sent to a server. Favorites and recent tool names are saved locally only. Reloading clears your input.

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