Colour Contrast Analyser

What Is Colour Contrast Analyser?

Colour Contrast Analyser is a free design tool in the accessibility category that calculates the contrast ratio between foreground and background colors to evaluate compliance with Web Content Accessibility Guidelines (WCAG). It supports designers and developers in ensuring sufficient color visibility for text, images of text, and visual elements across various platforms, including websites, applications, and documents. Available as a desktop application for Windows and Mac, with no installation required, Colour Contrast Analyser fits into design workflows during color selection, UI prototyping, and accessibility audits to verify legibility under WCAG AA and AAA criteria.

What Colour Contrast Analyser Does

• Calculates contrast ratios between foreground and background colors using WCAG algorithms, including differences for normal text (4.5:1 minimum for AA), large text (3:1), and enhanced AAA levels (7:1).
• Provides pass/fail indicators based on WCAG 2.0 and 2.1 guidelines for text size, incidental text, and logotypes.
• Allows input of colors via HEX or RGB codes, color picker with adjustable sample size (1 to 8x8 pixels), and sliders.
• Displays real-time contrast ratio values and evaluates against brightness and color difference formulas.
• Simulates color blindness conditions to assess visibility for users with visual impairments.
• Offers text size adjustment, sample text preview, and zoom functionality for precise testing.

How Colour Contrast Analyser Can Be Used

• During UI design, select colors with the eye dropper tool from mockups or live sites to check if text meets WCAG contrast minimums before implementation.
• In web development workflows, test foreground text against background colors on prototypes, adjusting for large text exceptions or incidental elements.
• Audit existing websites, apps, social media graphics, PowerPoint slides, PDFs, or InDesign files by sampling colors directly to identify accessibility issues.
• Verify color combinations for graphical controls and visual indicators in desktop or mobile interfaces using the desktop app's color picker.
• Combine with browser extensions or export reports to document compliance during accessibility reviews.

Who Is Colour Contrast Analyser For?

Colour Contrast Analyser serves web designers, UI/UX developers, accessibility specialists, and compliance testers working on projects requiring WCAG adherence, such as government sites, enterprise applications, or inclusive digital products. It suits teams handling startups, SMEs, or enterprises where color legibility impacts usability for users with low vision or color deficits. Experience levels range from junior designers learning accessibility basics to senior auditors conducting thorough evaluations.Visit Colour Contrast Analyser