Color Contrast Checker

Overview

Color Contrast Checker is a Color tool that Color contrast checker: calculate contrast per WCAG 2.1 and AA/AAA pass with picker and replacement suggestions for accessible design. It runs 100% in your browser with no upload, so you get instant results with privacy. Whether you need a quick answer or batch processing with precise control, you can enter, validate and export in seconds. The UI is responsive on mobile, tablet and desktop and supports one-click copy.

Use cases

• Daily use of Color Contrast Checker: Pick foreground and background colors; the ratio and WCAG AA/AAA levels are shown instantly with a live preview. — enter and get instant results without manual lookup.
• When your sheet or doc involves “wcag, contrast checker”, batch process and copy results to keep data consistent.
• Use Color Contrast Checker offline or on poor network — all calculations stay local and private.
• Check WCAG contrast while picking UI colors to avoid accessibility rejections
• Generate harmonious palettes and complementary colors for campaigns

How to use

1. 1 Pick foreground and background colors; the ratio and WCAG AA/AAA levels are shown instantly with a live preview..
2. 2 Switch color spaces and watch live preview and contrast scores
3. 3 Copy results as CSS, Tailwind or design-token formats
4. 4 Export palettes as ASE/JSON for Figma or Photoshop

Highlights

• Local & private: processing stays in your browser
• Live validation with tolerant parsing
• One-click copy and export for docs, code or sheets
• Batch and offline support under poor network

Notes

• Alpha affects blended contrast; re-check on final background
• Displays vary—verify critical colors on target devices
• Export large palettes in batches to avoid memory spikes

FAQ