Colour Contrast Analyser
A free desktop app for checking foreground and background color contrast against WCAG, with eyedropper pickers.
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Run by third parties, not by Vispero (TPGi). Prefer the official page above when it works.
About Colour Contrast Analyser
Colour Contrast Analyser (CCA) checks whether text and visual elements have enough color contrast for people with low vision or color blindness. It reports results against WCAG 2.0, 2.1 and 2.2 at levels A, AA and AAA.
Colors can be picked from anywhere on screen with eyedroppers or typed in HEX, RGB, HSV or HSL, and foreground colors can include alpha transparency. Sliders help adjust a failing pair until it passes. Because it samples the screen, it works for websites, apps, slides, PDFs and design files.
Strengths
- Screen-wide eyedropper for foreground and background
- Results for WCAG 2.0, 2.1 and 2.2
- Accepts HEX, RGB, HSV and HSL values
- Sliders to adjust colors until they pass
Limitations
- Windows and macOS only
- Checks one color pair at a time
Details
- Pricing
- FreeFree to download, with source code published on GitHub.
- License
- GPL-3.0
- Developer
- Vispero (TPGi)
- Platforms
- Windows, macOS
- How it runs
- Downloadable app
- Account
- Not required
- Works offline
- Yes
- Best suited for
- Designers and accessibility testers checking color contrast against WCAG
- Categories
- Color tools, Website testing
- Last verified
- Added
- Provenance
- Facts checked against the developer's own pages and store listings, 1 sources on file.
Alternatives to Colour Contrast Analyser
Compare allSoftware that can replace Colour Contrast Analyser for an important use case, and what changes if you switch.
WebAIM Contrast Checker
An online checker that tests foreground and background color contrast against WCAG AA and AAA levels.
WebAIM Contrast Checker runs in the browser on any platform with separate normal text, large text and UI results, but has no screen eyedropper.
Contrast Finder
A web tool that checks color contrast against WCAG and suggests close valid color pairs.
Contrast Finder is a web tool under AGPL-3.0 that suggests close passing colors and can be self-hosted, without a desktop eyedropper.
Colour Contrast Checker
A web tool that checks foreground and background colour pairs against WCAG contrast levels.
Colour Contrast Checker is a web tool with AA and AAA results, RGB or HSL sliders and Google font previews, but no desktop eyedropper.
Contrast Ratio
A web tool that calculates the WCAG contrast ratio between a text color and a background color.
Contrast Ratio is a web tool that updates live as you type CSS colors and handles semi-transparent colors, without an eyedropper.
Accessible Colors
A web checker that tests text and background contrast against WCAG and suggests the closest passing colors.
Accessible Colors is a web checker for AA and AAA that suggests nearest passing colors, based on WCAG 2.0 rules only.
Colorable
A web tool for testing the contrast of a text and background color pair against WCAG levels.
Colorable is a minimal web tool with HSL sliders and reverse and random buttons, showing contrast ratio and WCAG level together.
WhoCanUse
A web tool showing how a text and background color pair looks to people with various vision conditions.
WhoCanUse is a web tool that previews a color pair across vision conditions and shows share of people affected, without a desktop eyedropper.
Sip
A macOS menu bar color picker for collecting, organizing and sharing color palettes.
Sip is a paid macOS color picker that includes a contrast checker and color blindness simulation alongside palette management.
Colour Contrast Analyser as an alternative
Listings that name Colour Contrast Analyser as an alternative.
Accessible Color Generator
A web tool that finds the closest accessible variation of a brand color for a chosen background.
Colour Contrast Analyser is an open-source desktop app for Windows and macOS with a screen-wide eyedropper and sliders to adjust colors until they pass WCAG 2.2.
ColorSlurp
Color picker for Mac and iOS with a magnifier and palette management.
Colour Contrast Analyser is a free open-source Windows and macOS app with eyedroppers focused on WCAG contrast rather than palette management.
Gpick
An open-source desktop color picker and palette editor written in C++ with the GTK toolkit.
Colour Contrast Analyser is an open-source Windows and macOS app with a screen-wide eyedropper aimed at WCAG contrast checks rather than palette editing.
Instant Eyedropper
A free screen color picker for Windows and Linux that copies the picked color to the clipboard.
Colour Contrast Analyser offers a screen-wide eyedropper on Windows and macOS, but focuses on checking foreground and background contrast.
Just Color Picker
A free portable colour picker and colour editor for Windows and macOS that works offline.
Colour Contrast Analyser is an open-source Windows and macOS app whose eyedroppers focus on checking WCAG contrast between two colors.
Similar software
Related functionality, not necessarily a direct replacement.
RandomA11y
A web tool that generates random color pairs meeting WCAG contrast requirements.
Sim Daltonism
A color blindness simulator for Mac and iOS that filters a screen region or camera view.
Accessible Palette
A web tool for building color systems with consistent lightness and WCAG contrast across hues.
