# ColorContrast — Free WCAG Color Contrast Checker
# https://www.colorcontrast.org/

## Core Tools
/color-contrast-checker/: Primary WCAG AA/AAA contrast checker with AI suggestions and PDF export
/url-contrast-checker/: Scan any live URL for contrast violations across every text element
/apca-contrast-calculator/: Next-gen APCA contrast calculator (WCAG 3.0 standard)
/color-blindness-simulator/: Simulate deuteranopia, protanopia, tritanopia, and achromatopsia
/color-palette-from-image/: Extract dominant colors from uploaded images
/accessible-color-palette/: Generate WCAG-compliant color palettes from a seed color
/contrast-ratio-calculator/: Upload screenshots and mockups to sample colors visually

## Key Blog Posts
/blog/what-is-color-contrast-ratio/: WCAG contrast ratio explained — the 21:1 scale with real examples
/blog/color-blind-friendly-palette/: How to design color-blind-friendly palettes — 5 rules
/blog/wcag-contrast-requirements/: WCAG contrast requirements cheat sheet for developers (2026)

## About
ColorContrast is a free, browser-based accessibility toolkit for developers and designers. All calculations run client-side — no data is ever uploaded to any server. No signup required, no ads.