Accessibility Tools
9 free color accessibility tools. Test WCAG 2.2 contrast, simulate color blindness, build accessible palettes and ensure your design works for everyone.
Contrast Checker
Test any two colors for WCAG AA and AAA compliance. See exact contrast ratios.
Open Tool →WCAG Contrast Checker
Full WCAG 2.2 validation for normal and large text at AA and AAA levels.
Open Tool →WCAG Color Checker
Verify WCAG 2.2 color compliance for any color pair with exact pass/fail results.
Open Tool →Text Contrast Checker
Check if your text is readable against any background. WCAG compliance included.
Open Tool →Background Contrast Checker
Find which text colors pass WCAG against any background. Get recommendations.
Open Tool →Contrast Ratio Calculator
Calculate exact WCAG contrast ratio with full breakdown of the math.
Open Tool →Readability Color Checker
Beyond WCAG — practical readability assessment for body text and placeholders.
Open Tool →Color Blindness Simulator
Simulate how any color appears to people with 7 types of color vision deficiency.
Open Tool →Accessible Palette Generator
Generate palettes that guarantee WCAG compliance. Every pair is pre-verified.
Open Tool →About Color Accessibility
Web accessibility means designing interfaces that work for everyone — including people with low vision, color vision deficiency (color blindness), or anyone using their device in bright light. WCAG (Web Content Accessibility Guidelines) is the international standard for web accessibility, and its color contrast requirements are the most commonly tested criteria.
WCAG 2.2 Contrast Requirements
- AA Normal text (under 18pt): Minimum 4.5:1 contrast ratio
- AA Large text (18pt+ or 14pt+ bold): Minimum 3:1 contrast ratio
- AAA Normal text: Minimum 7:1 contrast ratio
- AAA Large text: Minimum 4.5:1 contrast ratio
Why Accessibility Matters
Roughly 1 in 12 men and 1 in 200 women have some form of color vision deficiency. Millions more have low vision. Accessible design is not just a legal requirement in many jurisdictions — it is a moral one. Every tool in this category helps you build interfaces that truly work for everyone.