What common accessibility barriers hurt user experience?

Common accessibility barriers include poor color contrast, missing alt text for images, lack of keyboard navigation support, non-descriptive labels and error messages, elements that look interactive but are not, complex content that is difficult to process, poor mobile responsiveness, and slow loading times. Each barrier blocks a specific user group while degrading the experience for everyone.

Color contrast failures affect colorblind and visually impaired users but also frustrate anyone viewing a screen in suboptimal lighting. Missing alt tags on images prevent screen reader users from understanding visual content and simultaneously reduce SEO value. Lack of keyboard navigation capability blocks users with motor disabilities and removes a productivity tool from power users. Non-descriptive labels and confusing microcopy force all users to guess at meaning. Affordance mismatches (elements that look clickable but are not, or functional elements that do not look interactive) cause dead clicks and wasted effort across all user groups. Excessive visual noise and cluttered interfaces increase cognitive load for users with cognitive impairments and degrade focus for everyone else. Poor mobile responsiveness and slow performance compound these barriers on the devices where most users now access websites.