Color Contrast

Articles/Guides

• WebAIM: Contrast and Color Accessibility: Understanding WCAG 2 Contrast and Color Requirements

Online color checkers

These tools check color contrast ratios based on specified colors and font sizes, and recommend similar, alternative colors that would help you meet official guidelines.

• ColorSafe.co
• Accessible-Colors.com

Downloadable color checkers

• Color Contrast Analyser (CCA)
  • CCA has a built-in eyedropper tool that allows you to check color ratios from anything on your screen (be it a website, PDF, application, …).

Style guide examples

• UMN Libraries lists examples of good and bad contrasts using combinations of their brand colors in their online style guide.