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Accessibility & UX Best Practices

How to Check Website Color Contrast & WCAG Accessibility in 2025

WCAG 2.1 AA & AAA compliance checklist · 5 min read

Color accessibility is not just a best practice—it is essential for ensuring all users, including those with visual impairments or color vision deficiencies, can navigate and read your web applications with ease.

In this guide, we break down what WCAG contrast ratios mean and how you can audit any website’s color contrast in real-time.

Understanding WCAG 2.1 Contrast Standards

The Web Content Accessibility Guidelines (WCAG) specify mathematical ratios between text color and its background:

WCAG Level AA (Standard)

  • • Normal text: At least 4.5:1 contrast ratio.
  • • Large text (18pt+ or 14pt bold): At least 3:1 contrast ratio.
  • • UI components & icons: At least 3:1 against adjacent colors.

WCAG Level AAA (Enhanced)

  • • Normal text: At least 7.0:1 contrast ratio.
  • • Large text: At least 4.5:1 contrast ratio.
  • • Recommended for reading-heavy publications and government portals.

How to Test Contrast Ratios with ChromaPick

When you run ChromaPick on any live webpage or on our Live Playground, each extracted color swatch displays its computed luminance and contrast ratio against pure black (#000000) and pure white (#FFFFFF).

Check Live Contrast on Any Website

Extract color tokens and check accessibility in 1 click.

Add ChromaPick to Chrome — Free

Common Color Contrast Pitfalls to Avoid

  • Low-contrast placeholder text: Light gray placeholders (e.g. #D1D5DB on #FFFFFF) fail AA requirements (approx 1.5:1).
  • Text over background images or gradients: If a gradient shifts from dark to light, ensure the text maintains readable contrast across all gradient stops.
  • Muted badges and chips: Soft pastel chips with light text frequently fail contrast tests unless paired with a darker stroke or border.

Conclusion

Building accessible websites does not mean sacrificing aesthetics. By verifying your tokens early with automated tools, you deliver polished, readable, and legally compliant interfaces.

ChromaPick reports contrast ratios on the free tier. Pro ($10 one-time) adds unlimited extractions and history — useful if you audit sites regularly.

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