Web Accessibility
Color accessibility overview
Understand the standards, test your colors, and make your website more accessible to a wider range of users.
What is color accessibility?
Color accessibility means choosing colors that can be perceived and distinguished by as many people as possible, including people with low vision, color vision deficiencies, or other visual impairments. Thoughtful color choices can also help people viewing screens in bright sunlight, glare, dim lighting, or on lower-quality displays.
The Web Content Accessibility Guidelines, commonly known as WCAG, establish minimum contrast requirements intended to support the readability of text and the visibility of important interface elements.
The Web Content Accessibility Guidelines, commonly known as WCAG, establish minimum contrast requirements intended to support the readability of text and the visibility of important interface elements.
Check your colors
Poor color contrast is the single most common accessibility failure on the web. Our contrast checker lets you test any foreground and background combination against WCAG 2.1/2.2 AA and AAA contrast requirements instantly. It includes color blindness simulation, calculated fix suggestions, and AI-powered palette alternatives — all free, no account required.
Understand the requirements
WCAG can feel overwhelming — three conformance levels, dozens of success criteria, and technical language that assumes you already know the spec. Our plain-English guide breaks down the contrast requirements, explains what AA and AAA actually mean in practice, and clarifies what's required versus what's recommended.
Government websites
The Department of Justice’s ADA Title II rule generally requires state and local government websites and mobile apps to meet WCAG 2.1 Level AA. Following a 2026 extension, the compliance date is April 26, 2027, for entities serving 50,000 or more people and April 26, 2028, for smaller entities and special district governments.
Business websites
Title III of the ADA applies to businesses open to the public, and Department of Justice guidance states that the goods and services they provide online must be accessible to people with disabilities. Inaccessible websites can create barriers for customers and may lead to complaints, demand letters, or litigation. Our business guide explains common accessibility concerns and practical steps toward improving your website.
Color contrast is one of the most commonly detected accessibility problems—and one of the easiest to test. However, contrast alone cannot establish WCAG conformance or ADA compliance. A broader accessibility review also considers keyboard access, screen-reader compatibility, form labels, image alternatives, multimedia, page structure, and other potential barriers. Our contrast tools are a practical starting point. For a more comprehensive evaluation, explore our ADA audit and remediation services.
web accessibility
Beyond Color: Understanding Web Accessibility
Creating websites more people can use
Web accessibility means designing and developing websites so that people with a wide range of abilities can access their content, understand their information, and use their features.
You may also see accessibility shortened to a11y. The term combines the first and last letters of “accessibility,” with the number 11 representing the eleven letters between them.
Accessibility can affect nearly every part of a website, from its colors and typography to its navigation, forms, images, videos, and underlying code. A site may look clear and straightforward to one visitor while creating serious barriers for someone using a specialized keyboard, screen reader, magnification software, voice controls, or another assistive technology.
You may also see accessibility shortened to a11y. The term combines the first and last letters of “accessibility,” with the number 11 representing the eleven letters between them.
Accessibility can affect nearly every part of a website, from its colors and typography to its navigation, forms, images, videos, and underlying code. A site may look clear and straightforward to one visitor while creating serious barriers for someone using a specialized keyboard, screen reader, magnification software, voice controls, or another assistive technology.
Accessibility Involves the whole website
Color contrast is an important part of accessibility, but it is only one piece of the larger picture. Accessible websites may also require:
- Clear page structure and meaningful headings
- Keyboard-accessible navigation and controls
- Visible focus indicators
- Properly labeled forms and understandable error messages
- Appropriate alternatives for images and other visual content
- Captions or transcripts for multimedia
- Descriptive links and buttons
- Readable text that can be resized
- Compatibility with browsers and assistive technologies
Need help improving your website?
We provide accessibility audits and remediation services for organizations that need help identifying barriers and improving their websites. Learn more about our ADA audit and remediation services and how a broader accessibility review can support a more usable website and a more positive digital experience for your visitors.