The APCA version, to be licensed for use with guidelines: W3/AGWG.
Some useful resources for web accessibility
Free, open-source colour contrast checker. Tests foreground/background combinations against WCAG 2.1 AA and AAA. Guarantees 5 passing suggestions.
design intelligence for ai coding agents. one unified cli, 36 commands across recon, review, build, plan, ship, test, reflect, power. zero npm deps.
A multi-color contrast checker that lets you test colors across multiple backgrounds and UI contexts — not just for WCAG compliance, but for practical, system-wide accessibility.
Dependency-free color contrast checker. WCAG 2.2 AA/AAA + APCA, divergence detection, conformant color suggestions. Zero build step.
A tool to help designers and developers choose accessible text and background color combinations that meet WCAG standards.
Technical responses to common misconceptions about APCA
Create, preview, and share brand typography & color tokens with a friendly contrast checker. Vite/React + Cloudflare Worker/D1.
Draw on your live website. Freehand feedback for AI agents.
WCAG 2.2 color contrast checker with automatic accessible color suggestions.
Free WCAG color contrast checker and accessible palette builder. Verify AA/AAA compliance in real-time, simulate color blindness, get accessible color suggestions, and export palettes to CSS, Tailwind, JSON, SCSS, Swift, Android, and Design Tokens.
Browser-first design quality scanner. Opens real pages in Playwright, measures actual pixels, catches AI slop patterns. Fixes them too.
A small local Python tool for checking WCAG 2.x contrast ratios for color pairs, CSV files, and JSON design tokens, with a CLI, Markdown/JSON reports, and reproducible tests.
A comprehensive WCAG 2.1 color contrast checker that validates text and background color combinations against accessibility standards (AA and AAA levels) and provides suggested fixes for failing contrasts. WCAG contrast checker for text and background colors.
A modern, all-in-one suite for color generation, contrast checking, and design inspiration.
WCAG Contrast Wheel is a lightweight, dependency-free tool that visualizes WCAG contrast accessibility directly on a color wheel.
Identify and save colors from the real world using your camera or any photo. Free Android & iOS color picker app by lapnito.cz s.r.o. Live camera eyedropper with HEX, RGB, HSL, CMYK codes. Palette builder, RAL matching, contrast checker, color harmonies.
A palette-first color toolkit for WCAG contrast checks, scale generation, and token exports.
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