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POLARIS OFFICE TOOLS+
contrast

Color Contrast & WCAG Calculator

Check the contrast ratio of two colors and WCAG AA or AAA compliance.

Contrast ratio

17.74:1

Normal text AA
Pass
Large text AA
Pass
Normal text AAA
Pass
Large text AAA
Pass

Uses the WCAG relative-luminance formula. Normal-text AA requires at least 4.5:1.

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How to use

  • 1. Check the size and formats shown in the uploader, then choose or drag in your file
  • 2. Pixel limits: AI Upscale (2048×2048), AI Colorize (2048×2048), others (no limit)
  • 3. Run the tool you need and download the result
  • 4. Files are saved safely on your device

Security

  • • Each tool clearly identifies whether it uses browser or API processing
  • • Browser-processing tools do not upload files to a server
  • • Optional or required API tools may send the file only to complete that task
  • • Image file contents are not sent to analytics or advertising systems

Features

  • • All image tools in one place
  • • Background removal, resize, compress, format conversion, and more
  • • Download button activates when processing completes
  • • Fast and intuitive user interface
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