To pass Web Content Accessibility Guidelines (WCAG) compliance using a Colour Contrast Analyser, you must ensure your foreground text and user interface elements achieve the minimum required mathematical contrast ratios against their background. This is verified by sampling hex codes from your live site or design files using an eyedropper tool to get an immediate pass/fail verdict. 🎯 Required WCAG Contrast Ratios
The exact ratio you need to hit depends on your target compliance level (Level AA is the standard legal baseline for most international regulations): Element Type Level AA Requirement Level AAA Requirement Definition / Examples Normal Text 4.5:1 7:1
Small body copy under 18pt (24px) or bold under 14pt (19px). Large Text 3:1 4.5:1
Text that is 18pt (24px) and larger, or 14pt (19px) and larger if bold. UI Components 3:1 3:1 Form borders, interactive icons, buttons, and focus rings. 🛠️ Step-by-Step Workflow with an Analyser
Popular standalone applications like the TPGI Colour Contrast Analyser (CCA) or web-based utilities like the WebAIM Contrast Checker streamline compliance audits.
Launch the Tool: Open your chosen software or web panel next to your design workspace or browser.
Sample the Foreground: Click the foreground eyedropper tool and click directly on your text or icon pixel.
Sample the Background: Select the background eyedropper and sample the area directly behind that text.
Review the Verdict: The tool will instantly calculate the ratio and display a Pass or Fail grid across AA and AAA thresholds.
Adjust in Real Time: If the combination fails, use the tool’s built-in Lightness sliders to darken the text or lighten the background until the ratio ticks over into compliance. ⚠️ Common Pitfalls to Avoid Web Accessibility Color Contrast Checker – Conform to WCAG
WCAG Color Contrast Checker. Enter color combinations below to check whether they conform to Web Content Accessibility Guidelines. Accessible Web Contrast Checker – WebAIM
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