1 in 4 adults in the US has a disability. Globally, over 1 billion people experience some form of disability. When your website isn't accessible, you're excluding a massive segment of potential customers.
What Web Accessibility Means
Accessibility means designing and building websites that can be used by people with visual, auditory, motor, or cognitive disabilities. The Web Content Accessibility Guidelines (WCAG) provide the international standard.
The Four Principles: POUR
Perceivable
All content must be perceivable. Images need alt text. Videos need captions. Content can't rely on color alone to convey meaning.
Operable
All functionality must work via keyboard. No mouse required. Focus states must be visible. Users need enough time to read and interact with content.
Understandable
Content must be readable and predictable. Error messages must be helpful. Forms must have clear labels.
Robust
Content must work with current and future assistive technologies like screen readers.
Quick Wins for Better Accessibility
Add alt text to all images. Ensure 4.5:1 color contrast ratio for text. Make all interactive elements keyboard-accessible. Add skip navigation links. Use semantic HTML (headings, lists, buttons).
Designing for disability often creates innovations that benefit everyone. Curb cuts help wheelchair users — and also parents with strollers.
Testing Your Accessibility
Tools: WAVE, axe, Lighthouse. Real testing: navigate with keyboard only. Test with VoiceOver (Mac) or NVDA (Windows). Ask users with disabilities to test your site.
The Legal Reality
In the US, EU, and many other regions, website accessibility is increasingly a legal requirement. ADA lawsuits over inaccessible websites have surged. Build it right from the start.