Free WCAG Color Contrast Checker
Verify text-to-background contrast ratios against WCAG standards. No registration, runs 100% locally in your browser.
Normal Text Sample
Designing visually accessible color combinations ensures readability for all users.
Large Text Heading
Extract colors directly from any website
Why upload screenshots manually? Use the Supashot Chrome Extension to grab colors directly from any live webpage or design system.
What is the Free WCAG Color Contrast Checker?
The WCAG Color Contrast Checker is a vital accessibility tool for web developers and UI designers. It calculates the contrast ratio between text and background colors to ensure compliance with WCAG 2.1 AA and AAA standards. Creating accessible designs ensures your content is legible for visually impaired users and improves overall user experience.
100% Private, Client-Side Processing
Accessibility testing should be fast and secure. This tool calculates the standard WCAG relative luminance formulas entirely locally in your browser. Your brand colors and design tokens are never sent to our servers. Ensuring your digital products are accessible is a core part of the local-first ethos of Supashot.
How WCAG Color Contrast Checker Works
Enter your text color and background color using HEX or RGB values.
The tool instantly calculates the contrast ratio using the WCAG luminance formula.
Review the pass/fail score for normal text, large text, and UI components.
Why Choose Supashot?
vs. Server-Based Auditors
Calculates contrast ratios instantly in real-time as you type, using local browser math to keep your unreleased brand palettes completely private.
vs. Complex Accessibility Suites
Provides a highly focused, distraction-free interface dedicated solely to verifying WCAG compliance for specific color pairs.
Frequently Asked Questions
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