Color Contrast Checker – TPGi

Have a question about the Colour Contrast Analyser or discovered a bug?
Visit the Colour Contrast Analyser (CCA) repository on GitHub.

Colour Contrast Analyser (CCA)

TPGi’s free color contrast checker tool that allows you to easily determine the contrast ratio of two colors simply using an eyedrop tool. The CCA enables you to optimize your content–including text and visual elements–for individuals with vision disabilities like color-blindness and low-vision impairments.


  • Compliance indicators for Web Content Accessibility Guidelines 2.1 (WCAG 2.1)
  • Multiple ways to select colors: you can manually enter CSS color formats, use an RGB Slider, or opt for the color picker tool
  • Color Blindness Simulator
  • Support for alpha transparency on foreground colors

Download TPGi Color Contrast Analyser for Windows

Download the TPGi CCA for Mac

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WCAG Color Contrast

The Web Content Accessibility Guidelines (WCAG) define the different levels of contrast ratios depending on the level of success criteria. Below is helpful information for comparing the results from our tool to the level of success criteria you hope to achieve. Learn more about WCAG color contrast.

  • WCAG 2.0 level [...]

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