🔍 Contrast Checker
Check color contrast ratios and verify WCAG AA and AAA accessibility compliance for foreground and background colors.
Sample Text Preview
The quick brown fox jumps over the lazy dog.
WCAG Contrast Ratio Checker
The Contrast Checker evaluates the readability of text against its background by calculating the color contrast ratio according to the Web Content Accessibility Guidelines (WCAG). Accessibility is not optional — it is both a legal requirement and a moral imperative for modern websites.
This tool checks your foreground and background color combinations against WCAG 2.1 success criteria for both AA and AAA conformance levels. It covers both normal text (smaller than 18pt or 14pt bold) and large text. A live preview shows exactly how your chosen colors look together.
Use this tool during the design phase to catch contrast issues before they reach production. It supports both HEX input and a visual color picker, making it easy to test colors from your design system or brand guidelines.
Frequently Asked Questions
What is the minimum contrast ratio for WCAG AA compliance?
For normal text (under 18pt or 14pt bold), WCAG AA requires a minimum contrast ratio of 4.5:1. For large text, the requirement is 3:1.
What is the difference between WCAG AA and AAA?
WCAG AA is the standard level of accessibility compliance, suitable for most websites. WCAG AAA is a higher standard requiring 7:1 contrast for normal text and 4.5:1 for large text.
Why does contrast matter for web accessibility?
Sufficient color contrast ensures text is readable for users with visual impairments, including color blindness, low vision, and age-related vision loss. It is a legal requirement in many jurisdictions.