Accessibility means designing products that work for people with diverse abilities. Not just people with disabilities, though that is the core. Someone with a broken wrist. Someone in bright sunlight. Someone using a screen reader. Someone who cannot hear a video. The design decisions that help them help everyone else too.

The Web Content Accessibility Guidelines set the standard for digital products. Four principles: perceivable, operable, understandable, and robust. Text alternatives for images. Keyboard navigation for everything. Sufficient color contrast. Captions on video. Each guideline addresses a specific barrier. The practices are not exotic. They are basic design hygiene that too many teams skip. Physical products have their own accessibility concerns. Door handles that work without gripping. Packaging that opens without scissors. Instructions that use plain language. The curb cut effect explains why accessibility benefits everyone. Curb cuts were designed for wheelchairs. Parents with strollers, travelers with luggage, and delivery workers all use them. The same principle applies to captions, voice control, and high-contrast modes. Designing for the margins improves the mainstream.

Core accessibility areas

• Visual — contrast, text size, screen reader support
• Motor — keyboard navigation, touch target size
• Auditory — captions, transcripts, visual alerts
• Cognitive — plain language, consistent layout

Accessibility is not a feature. It is a requirement. A product that excludes people is a product with a defect.