Colour Contrast Analyser (CCA) review
A focused, free contrast checker for designers working on Windows or macOS.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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.
Colour Contrast Analyser (CCA) pros and cons
- 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
Colour Contrast Analyser (CCA) fact sheet, pricing and score →
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