Colour Contrast Analyser (CCA)
Colour Contrast Analyser (CCA): A focused, free contrast checker for designers working on Windows or macOS. Ranked #127 of 129 in Website Accessibility Tools by our editors (3.0/10); pricing: Free plan; best for designers validating color contrast for free.
At a glance
- Editor score3.0 / 10
- PricingFree plan
- Best forDesigners validating color contrast for free
- Free planYes
- Paid fromFree
- Facts checked23 Sep 2026
Where it wins
- Checks WCAG 2.0, 2.1, and 2.2 contrast ratios
- Includes color pickers, transparency support, and adjustable color sliders
- Adds eight color-blindness simulations and WCAG A, AA, and AAA indicators
Where it doesn't
- Focuses on color contrast rather than full website accessibility
- Provides no website scanning features
- Offers no integrations
Our verdict on Colour Contrast Analyser (CCA)
Colour Contrast Analyser is a free, open-source desktop application from Vispero for designers, developers, accessibility practitioners, and content creators. It evaluates text, interface elements, graphics, and other visual content against WCAG contrast criteria. Windows and macOS downloads make it suited to individual design and development workflows where color decisions need a focused accessibility check rather than a broader website audit.
Its strongest area is the depth of its color-contrast workflow. Results cover WCAG 2.0, 2.1, and 2.2, with conformance indicators for A, AA, and AAA levels. Users can enter colors in HEX, RGB, HSV, or HSL formats, select foreground and background colors with pickers, and adjust RGB, HSV, and HSL sliders. Alpha-transparency support applies to foreground colors, while sample previews cover text and non-text contrast. Copyable short and long test-result formats support sharing or recording findings.
The tool also includes a color-blindness simulator with eight vision-deficiency settings, plus light, dark, and system-default themes. Those capabilities make it useful for validating visual choices during design review or content production, especially when a free desktop tool is sufficient. Its narrow scope is also the key boundary: Colour Contrast Analyser checks color contrast but does not scan websites or provide integrations. Choose it for focused, manual WCAG contrast validation on Windows or macOS; teams seeking website scanning or connected workflows should consider a broader accessibility tool.
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Colour Contrast Analyser (CCA) pricing
Colour Contrast Analyser (CCA) fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| WCAG version | Not verified |
| Scan scope | Not verified |
| Scan limit | Not verified |
| Scheduled scans | Not verified |
| Browser extension | No |
| CI/CD integration | No |
| API access | Not verified |
| Deployment | Desktop |
| Platforms | Windows, macOS |
| Support | Community |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan |
| Website | tpgi.com |
| Facts checked | 23 Sep 2026 |
Alternatives to Colour Contrast Analyser (CCA)
- Octopus Scanner (formerly A11y Scanner)A free desktop scanner for detailed local audits of complex websites.9.3
- WAVEA flexible accessibility suite spanning free page checks, browser extensions, APIs, and CI workflows.9.1
- IBM Equal Access Accessibility CheckerA technically focused toolkit for browser, batch, and CI/CD accessibility checks.9.0
See all Colour Contrast Analyser (CCA) alternatives →
Also Ranked In
Colour Contrast Analyser (CCA) is ranked in 3 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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