Free Colour Contrast Checkers by Country and Standard
Choose the right free colour contrast checker for your region or accessibility standard. Each checker helps you compare element and background colours against WCAG contrast requirements.
The contrast thresholds are generally the same, but laws, covered organisations and other requirements can differ. Find your region below, or use our general colour contrast checker. A colour contrast result does not confirm full website accessibility or legal compliance.
EAA Colour Contrast Checker for the European Union
Working on a product or service covered by the European Accessibility Act? Start with the EAA colour contrast checker to compare text and background colours against WCAG contrast requirements. It is a practical step when reviewing content for customers in Ireland and across the EU. The EAA covers specified products and services, such as e-commerce banking, e-books, electronic communications and transport.
ADA Color Contrast Checker for the United States
Designing a website for people in the United States? Use the ADA color contrast checker to review text and background combinations against WCAG thresholds. Clear contrast helps people read navigation, forms and essential information. ADA requirements depend on the organisation and service involved; passing a colour check does not mean full ADA compliance. Use the result as part of a wider accessibility review.
Section 508 Colour Contrast Checker
Creating digital content for a US federal agency or a contract with Section 508 requirements? Check your text and background colours before publication. The revised Section 508 standards incorporate WCAG 2.0 Level A and AA for covered web content, including minimum text contrast. This checker helps you analyse a colour combination and help you with suggestions for improvements.
AODA Colour Contrast Checker for Ontario
Working on a website covered by Ontario’s AODA accessibility requirements? Use the AODA colour contrast checker to review text and background colours against WCAG thresholds. Ontario’s web requirements reference WCAG 2.0 Level AA, with specified exceptions, for designated public-sector organisations and businesses or non-profits with 50 or more employees. A colour check supports your review for colour combinations and suggests improvements where needed.
Colour Contrast Checker for UK Accessibility Requirements
Check text and background colours for your UK website with our free colour contrast checker. UK public-sector guidance specifies WCAG 2.2 Level AA. Wider accessibility duties depend on your organisation and whether the Equality Act 2010 or Northern Ireland’s Disability Discrimination Act applies. Use the checker to improve colour choices, then assess the other requirements relevant to your content and services.
DDA Colour Contrast Checker for Australia
Make colour choices easier to read for people using your Australian website. Our DDA colour contrast checker helps you compare an element and background combination against WCAG thresholds. The Australian Human Rights Commission’s digital accessibility guidelines recommend WCAG 2.2 Level AA as a minimum. Use your contrast result to improve your design and consider wider accessibility requirements under the Disability Discrimination Act.
Colour Contrast Checker for New Zealand
Review text and background colours for your New Zealand website using our free checker. The New Zealand Government Web Accessibility Standard 1.2 requires WCAG 2.2 Level AA for mandated organisations, subject to its exceptions. Contrast is one part of that standard. Use the checker while designing or updating content, then analyse the rest of the page and any other requirements that apply to your organisation.
Build Accessibility Into your Everyday Work
Start with a colour combination, then use Nexus Inclusion to prevent barriers, detect and analyse issues, and guide you on improvements across your digital content.
Prevent Barriers
Review colours and content while you design. Bring accessibility checks into your workflow before content reaches your customers.
Explore Content Tools Detect and Analyse Issues
Use website scanning and monitoring to detect accessibility issues, understand their severity and track changes as your website develops.
Explore Website Scanning Learn and Improve
Help your team understand accessibility requirements and apply what they learn through Nexus Inclusion’s guidance and training resources.
Explore Learning Take your digital accessibility work further
Build on your colour checks with tools that help your team find barriers, understand priorities and improve digital content.
More accessibility tools and guidance
Coming Soon
Free Contrast Checker Browser Extension
Inspect individual page elements with our free browser extension. Check contrast directly on your page and quickly identify issues as they appear.
Compliance Guides
Explore the accessibility requirements relevant to your organisation and the regions where you operate.
Free Website Accessibility Checker
Look beyond colour combinations with an automated check of your homepage. Use the findings to guide a wider accessibility review.