Interactive Workspace
Verified Tool
How to Use Color Palette & WCAG Contrast Checker
STEP 1
Select or Paste Input
Upload your document, image, or paste text parameters directly into the workspace.
STEP 2
Execute Processing
Click the action button to process data locally in your browser with zero latency.
STEP 3
Copy or Download
Copy output text or download high-quality files with zero watermarks or ads.
Key Features & Privacy Standards
- ✓ 100% In-Browser Privacy: Files and text inputs are never stored on external tracking servers.
- ✓ Zero Watermarks: Export clean PDFs, images, and code snippets ready for production deployment.
- ✓ Free Forever: No signups, credit cards, or hidden usage limits.
- ✓ Cross-Platform Mobile Support: Optimized for iOS, Android, macOS, Windows, and Linux.
Detailed Overview
The Color Palette and WCAG Contrast Checker calculates the contrast ratio between a foreground and a background colour according to WCAG 2.1 guidelines, and reports whether the combination passes AA or AAA level for normal text and for large text. It helps designers and developers choose colour pairs that remain readable, rather than guessing from how a combination looks on one screen.
To use it, pick your foreground and background colours and read the ratio together with the pass or fail result for each text size. Remember that large text has a lower threshold than normal text, so a pair that passes for headings may still fail for body copy. Test the actual text sizes you use, not just the default, and test every colour pair in your design, including buttons, links and muted text.
Do not rely on a single screen for the verdict. The same colours can look different on bright, dim or low-quality displays, and users with different vision will experience them differently, so a passing ratio is a strong signal but not the whole story. Where text matters most, such as error messages and primary actions, aim for AAA or a comfortable margin above AA.
One honest limitation: the tool calculates a mathematical ratio only. It cannot judge overall readability, font choice, text size in context, or the needs of users with specific vision conditions, so use it alongside real testing with people where accessibility genuinely matters.
To use it, pick your foreground and background colours and read the ratio together with the pass or fail result for each text size. Remember that large text has a lower threshold than normal text, so a pair that passes for headings may still fail for body copy. Test the actual text sizes you use, not just the default, and test every colour pair in your design, including buttons, links and muted text.
Do not rely on a single screen for the verdict. The same colours can look different on bright, dim or low-quality displays, and users with different vision will experience them differently, so a passing ratio is a strong signal but not the whole story. Where text matters most, such as error messages and primary actions, aim for AAA or a comfortable margin above AA.
One honest limitation: the tool calculates a mathematical ratio only. It cannot judge overall readability, font choice, text size in context, or the needs of users with specific vision conditions, so use it alongside real testing with people where accessibility genuinely matters.
Tool FAQs
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Absolutely. Processing takes place inside your client browser session, guaranteeing complete confidentiality.