A11Y
A/B Testing8 min read

What is Accessibility in UI/UX Design

MP

Maya Patel

UX Researcher

December 5, 2025
8 min read

Inclusivity is at the heart of exceptional design. Explore the critical aspects of accessibility and how to bake them into every stage of your process.

Accessibility is Good Design for Everyone

The most persistent myth about accessibility is that it is a special consideration for a small minority of users. In reality, accessible design improves the experience for everyone. Captions benefit users in noisy environments, not just those who are deaf. High-contrast text is easier to read in bright sunlight, not just for users with low vision. Keyboard navigation benefits power users with RSI as much as those who cannot use a mouse.

The curb-cut effect — a term borrowed from urban design, where kerb cuts built for wheelchair users became essential for parents with pushchairs, delivery workers, and cyclists — applies with equal force to digital products. Design for the edge case and you improve the centre.

WCAG Guidelines in Practice

The Web Content Accessibility Guidelines (WCAG) organise accessibility requirements under four principles: Perceivable, Operable, Understandable, and Robust. WCAG 2.1 AA is the standard referenced in most accessibility legislation globally and the target every product team should aim for as a minimum.

The most impactful practical steps are: ensuring sufficient colour contrast (4.5:1 for normal text, 3:1 for large text), providing text alternatives for all images and icons, ensuring all interactive elements are reachable and operable via keyboard, avoiding content that flashes more than three times per second, and ensuring that forms label their inputs clearly and surface errors in a way that does not rely solely on colour.

Building Accessibility Into Your Process

Retrofitting accessibility after a product is built is dramatically more expensive than building it in from the start. The goal is to make accessibility a checkpoint at every stage of the design and development process rather than an audit that happens at the end.

In design: annotate components with their intended ARIA roles, states, and keyboard behaviours before handoff. In development: use semantic HTML elements by default — a button that submits a form should be a button element, not a div with a click handler. In QA: run automated accessibility scanners on every PR and supplement them with manual keyboard testing and a quarterly screen-reader audit. Automated tools catch roughly 30% of issues; the rest require human judgement.

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