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Colour Contrast Analyser is a free, open-source accessibility testing application designed to evaluate the readability of text and visual interface elements. It calculates contrast ratios between foreground and background colors to help designers meet Web Content Accessibility Guidelines. Users can select colors through an integrated eyedropper, RGB sliders, or direct CSS color entry. The software displays WCAG 2.1 compliance indicators for normal text, large text, and graphical components. It also supports foreground transparency when calculating contrast. A color vision deficiency simulator helps users examine how color combinations may appear to people with different visual conditions. Built with Electron for Windows and macOS, it provides practical tools for assessing accessible color choices.
Features
- Foreground and background color contrast calculations with numerical ratio results
- WCAG 2.1 compliance indicators for normal text, large text, and graphical elements
- Integrated color picker for sampling colors directly from the computer screen
- Flexible color selection through CSS values, hexadecimal codes, and RGB sliders
- Foreground alpha transparency support for evaluating blended color combinations
- Color vision deficiency simulation for assessing interface accessibility across visual conditions
Project Samples
