How to Build a Responsive Website Using Web Accessibility Tools & Best Practices

Modern web development has one thing at its core: creating a responsive and accessible user experience (UX). This broadens not only a site’s potential traffic, but subscription and conversion rates as well. This primer gives you key tips for building a user-friendly and responsive website from the ground up.

Design Fundamentals and Ensuring Functionality

Any respected web development company in Sydney will tell you that an essential aspect of design in 2025 is ensuring your site works regardless of the device in use (e.g. tablet vs. desktop). This can be achieved by implementing a mobile-first design process: first developing for small screens before scaling up for larger viewports.

Adopting a scalable approach intuitively prioritises clean and efficient layouts, which greatly benefit users with low bandwidth and/or disabilities. Other steps include:

• The use of flexible values such as viewport units (e.g. vh, vw) and percentages, as well as ems or rems for font paddings and sizes. This makes proportional scaling of layouts and text much easier across devices.
• Optimisation for content reflows so they can display correctly without requiring horizontal scrolling. According to the latest Web Content Accessibility Guidelines (WCAG) revision, it’s recommended to optimise for a zoom level of up to 400% on a vertical display.

Intuitive Navigation and Structure

Proper header structure and usage of tags will create a clear, navigable, and predictable browsing experience for all users. Utilisation of header hierarchy and HTML5 elements will ensure a consistent UX for screen readers, which is popular accessibility software used by individuals with disabilities.

Navigation menus should be positioned consistently across the entire site, with interactive elements such as links and buttons easily distinguishable. These — along with other interactive areas like form fields and modal triggers — should also have full keyboard accessibility. This means every page should be entirely operable using the Tab, Enter, Spacebar, and other buttons on the keyboard. This accommodates individuals with limited motor skills, who may have difficulty using a mouse for prolonged periods.

Readability Beyond Colour Psychology

It’s a common mistake to rely excessively on colour when conveying information, such as the common cue “all red fields are required information”. To maximise accessibility, be sure to utilise a colour contrast ratio of at least 4.5 to 1 between foreground and background in order to help colour-blind or low vision users.

Out of consideration for users with epilepsy, make judicious use of animations and motion. Limit the use of rapid animations and other distracting elements. Provide the CSS prefers-reduced-motion media query as necessary, to give users a means to reduce or fully disable on-page motion. Finally, don’t be afraid to use large, highly readable text in standard font faces if it will help overall navigability.

What to Look for in Web Accessibility Testing

Once you’ve developed a dynamic and accessible site, it’s time to ensure it works across all devices without issue. Vary your testing parameters, changing on-screen brightness, pinching to zoom, and so on. Given a fully viable and inclusive UX, you should see a dramatic improvement in site traffic and reach.