What is the minimum AA ratio?
For normal text, the minimum required contrast ratio is 4.5:1.
WCAG Color Contrast Checker — Accessibility Compliance Tool
Verify color combinations against WCAG accessibility standards
Last updated: May 2026
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Ensure your website meets international accessibility standards. Audit color contrast ratios for WCAG 2.1 AA and AAA compliance to improve readability and user experience.
• Fact-Checked & Verified•Compliance: 2026 Standards•Last Updated: May 2026
01
Why Use our WCAG Color Contrast Checker?
Ensure your website meets international accessibility standards. Audit color contrast ratios for WCAG 2.1 AA and AAA compliance to improve readability and user experience.
How it works
It calculates the contrast ratio using the W3C WCAG formula and provides instant pass/fail results for different text sizes.
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Key Features of WCAG Color Contrast Checker
WCAG AA/AAA validation
Support for normal and large text
Live visual preview
03
Common Questions About WCAG Color Contrast Checker
Looking for more professional developer utilities?
Explore All WebToolkit Pro ToolsEditorial Standards & Processing Transparency
This utility is engineered and maintained under strict editorial and technical standards. All source calculations are audited against official formatting standards and RFC specifications to guarantee mathematical and logic accuracy.
Content Creation & Automation Transparency: To ensure our dynamic developer specifications and reference datasets remain fully comprehensive and updated against newly released RFC updates, this page compiles technical documentation using advanced programmatic retrieval tools. Every output data block, feature list, and system specification is subsequently audited, fact-checked, and verified by our systems engineers for absolute correctness and accuracy.
Security Guarantee: To guarantee absolute user privacy, this tool executes 100% client-side inside your web browser. None of your input strings, payloads, keys, or files are ever transmitted to a server or stored externally.
Built by Abu Sufyan • Also explore: Severance Calculator & TradeConvert
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