Here are some tools that specifically check for color contrast accessibility issues on websites. And a few related links below. Know any others?
Updated April 2024. Please feel free to comment with additions and corrections.
- WebAIM contrast checker
- Link Contrast Checker by WebAIM (for stubborn designers who won’t underline text links)
- The Contrast Triangle by Chip Cullen
- Colour Contrast Analyzer app by TPG
- Stark – for Figma, Sketch and Adobe XD
- Colour Contrast Check by Snook
Juicy Studio Accessibility Firefox add-on(no longer available)- Color Contrast Analyzer Chrome plug-in by NCSU
- Colorable – interactive web tool
- Contrast Ratio – by Lea Verou
- Tanaguru Contrast-Finder – web tool that offers solutions
- WCAG Contrast checker – Firefox add-on by Rumoroso
- Colour Contrast Determinator (beta) by Vision Australia
- ColorA11y Chrome extension by Matt Long
- A11y Color Palette by Matt Long
- Color Contrast Analyzer – Chrome extension by NCSU/Greg Kraus *supports gradients and advanced CSS attributes
- Text on background image a11y check – great for text over images
- Color Contrast Tester by Joe Dolson, supports alpha
- Accessible color palette builder by “toolness”
- Hex Naw by The Scenery
- Contrast calculation – Javascript in CodePen by Heydon Pickering
- Color Contrast iOS app (free with ads) by UserLight Ltd.
- Contrast Finder by Asqatasun (GitHub)
- WCAG Contrast Checker by Acart Communications
- HTML Color Codes by Dan’s Tools, supports alpha
- Contrast Checker by Fog Creek via Glitch
- Color by Cloudfare Design
- Color.Review by Anton Robsarve
- Contrast Grid by Eightshapes
- Pa11y – Create Accessible Color Palettes
- Button Contrast Checker by ADITUS
- Who can use this color combination? by Corey Ginnivan
- Color Palette Contrast Checker by Deque Systems
- Deque Color Contrast Analyzer by Deque Systems
- Odd Contrast by OddBird (Warning: doesn’t apply alpha channel at time of posting)
- Are my Colours Accessible? by Simon Taggart
- Accessible Brand Colors by Use All Five
NoCoffee vision simulator(no longer available)- ColorZilla color picker for Firefox and Chrome
- Eye Dropper Chrome extension
- Color Contrast for Better Readability article by Viget
- Contrast — Color Accessibility Mac OS X app ($6.99) by Nothing Magical Inc.
- Contrasts – iOS app, free plus upgrades
