Web design for the visually impaired

Your checkout page might be costing you more customers than you think.

Not because of shipping costs or clunky forms to fill out (although those don’t help), but because a meaningful share of potential buyers can’t use it. Low-vision users squint at gray-on-white text. Screen readers say “button button button” instead of “Complete purchase.” Keyboard navigation dead-ends before anyone reaches payment.

Most teams treat web accessibility as a legal shield, something to bolt on after Legal forwards that compliance memo. But accessibility does more than that. It removes friction from high-value user paths, makes your content findable by search engines, and can reduce legal risk (in that order of importance, if we’re being honest).

At an enterprise scale, website accessibility isn’t a one-time audit. You need systems that catch accessibility breaks before they ship and governance that keeps fixes from regressing three sprints later, often combining CI checks (like axe/Lighthouse), manual AT testing, and monitoring platforms such as Siteimprove.ai.

This guide covers how to:

• Connect accessibility wins with conversion rates and organic traffic, not checkbox compliance.
• Build an accessible website with interfaces that screen readers can parse, contrast ratios that work, and alt text that communicates.
• Set up testing and monitoring systems that stick across teams and releases.

Let’s start with what blocks visually impaired users when they hit your site.

The needs of visually impaired users

Users with low vision or blindness don’t navigate the web the same way sighted users do, and many teams don’t learn what breaks until an accessibility issue is escalated internally. The guidance below is technical and informed by Web Content Accessibility Guidelines (WCAG), not legal advice. WCAG is a technical standard. Legal obligations vary by jurisdiction and context. Consult qualified counsel for legal guidance.

I’ve seen this play out more times than I can count. Designers spend hours perfecting hover states while their form labels are completely missing. They obsess over a hero image while the navigation structure announces as “link link link link” to screen readers.

The problem isn’t that teams don’t care. It’s that they’re designing for a mouse-and-eyes interaction, and then they’re trying to patch in accessibility three sprints later when it’s exponentially harder to fix.

Here’s what visually impaired users face on a typical enterprise site:

For users with sight loss relying on screen readers:

• Vague link text like “click here” or “learn more” makes no sense when read out of context.
• Missing heading structure means there is no way to scan or jump between sections.
• Unlabeled form fields turn the checkout process into a guessing game.
• Images without alt text create information gaps (or worse, the screen reader announces “image-final-final-v3.jpg”).

For low-vision users working with magnifiers or high contrast:

• Gray text on white backgrounds disappears entirely.
• Tiny font sizes require zooming until layouts break.
• Color-only indicators (red for error, green for success) communicate nothing.
• Touch targets are too small to hit when everything’s magnified 200 percent.

Without proper accessibility features, these barriers prevent task completion at every stage of the user journey.

How assistive tech interprets your interface:

Screen readers parse the DOM, your page’s code structure, not the visual design you see in the browser. They announce elements based on semantic HTML, ARIA labels, and focus order. Do you build your navigation with <div> tags instead of proper <nav> landmarks? The screen reader can’t tell its navigation. Do your custom dropdowns fail to manage focus? Keyboard users get trapped halfway through your form.

Magnification tools zoom everything, including your carefully crafted 1440px layouts. Someone who needs 200 percent zoom to read 16px body text will turn your three-column grid into a horizontal scroll nightmare.

The biggest culprits are low contrast between text and background, missing or generic alt text, and vague link labels. These block task completion on forms, product pages, and checkout flows, right where you need people to convert.

How to implement screen reader compatibility

Build semantic, labeled interfaces so screen readers announce elements correctly, not as “button button button” but as “Complete purchase button, Checkout navigation, Email address field.”

The fastest way to break screen reader compatibility? Reach for <div> and <span> tags to build everything, then try to fake the semantics with ARIA attributes. You’ve just signed up for maintenance hell. Start with proper HTML, and most screen reader issues will solve themselves.

Semantic HTML does the heavy lifting

HTML elements announce their purpose automatically. Screen readers know what a <button> does. They understand that <nav> defines navigation. They let users jump between <h2> headings to scan content.

Semantic HTML elements and what they provide for screen reader users

Element	What it gives you	Don't use instead
<button>	Keyboard access, focus management, role announcement	<div onclick> with ARIA bolted on
<nav>	Navigation landmark users can jump to	<div class="navigation">
<h1> through <h6>	Hierarchical structure, scannable outline	<div class="heading">
<label> + <input>	Explicit form field association	Placeholder text as the only label

Use ARIA only when HTML can’t express what you need, such as custom tabs, accordions, and modal dialogs. These components don’t exist in native HTML, so ARIA fills the gap. But if you’re adding role="button" to a <div> instead of using <button>, you’re creating problems for no reason.

Write link text that screen readers can parse

Screen reader users pull up a list of every link on the page to navigate fast. Imagine that this list is filled with “click here,” “learn more,” and “read more.” It’s completely useless.

Compare these:

❌ “To download our accessibility guide, click here.”

✅ “Download our accessibility guide.”

❌ “Learn more” (used 15 times on one page).

✅ “See how Springfield Clinic improved conformance.”

Link text needs to make sense when ripped out of context and read in a flat list.

Test paths, not pages

Tab through your signup flow using only a keyboard. Does the focus jump from the email field to the footer, skipping the password field entirely? Does it disappear into a modal you can’t escape? Screen reader users hit the same dead ends.

Run a screen reader (NVDA on Windows is free, VoiceOver ships with Mac) through your checkout process. You’ll hear what visually impaired users hear: missing field labels, buttons that announce as “button” with no context, and error messages that never get announced.

Most teams skip this step because it feels tedious. But five minutes with a screen reader will surface issues that take weeks of support tickets to uncover otherwise.

Optimize color contrast and text size

Standardize contrast, typography, and zoom behavior so that low-vision users can read and navigate without strain.

Most design systems fail contrast requirements because someone fell in love with a muted gray palette without checking the numbers. Here’s what the WCAG require:

Minimum contrast ratios by element type

Element	Minimum contrast ratio	Example
Normal text	4.5:1 minimum	Body copy, captions, most UI text
Large text (18pt+ or bold 14pt+)	3:1 minimum	Headings, hero copy
UI components and graphical objects	3:1 against adjacent colors (when those visuals are needed to identify the component/state)	Input borders, controls, focus indicatios Note: Text inside buttons/control is still text and must meet the text-contract thresholds above.

That sophisticated gray-on-white scheme your brand team keeps pushing? It probably clocks in around 2.8:1, which makes it illegible for low vision users. Color blindness creates similar problems when you rely solely on color to convey information. Red error states and green success messages communicate nothing without text labels or icons.

Typography needs to scale without breaking layouts. Start with a 16px base font size and use relative units (rem or em) so the text grows when someone zooms to 200 percent.

Test template scrolling where required. If content or functionality is lost at the 200 percent text resize, or layouts require two-dimensional scrolling in reflow views, the experience breaks for many low-vision users. As a readability best practice, consider a line height of around 1.5 for body text (and test with your typography at high zoom).

Build enforcement into your workflow, not just guidelines. Document all approved color combinations as design tokens and run automated contrast checks in CI. Platforms such as Siteimprove.ai can help detect contrast failures and inconsistent component states earlier in the workflow, reducing the chance of issues shipping.

Designer judgment alone creates drift. Bake standards into reusable components so teams can’t accidentally ship failing color combinations under deadline pressure.

Incorporate alt text for images

Write alt text that communicates purpose and context, so screen reader users get the same information as sighted users.

Alt text is where teams either write novels or give up entirely. You’ll see 200-character descriptions of decorative stock photos sitting next to product shots tagged “image.” Good alt text depends on what the image does on that specific page:

• Informative images (product photos, diagrams): These describe what matters for the page goal. “Blue mesh running shoe with white sole” is better than “woman smiling while jogging on sunny beach.”
• Functional images (icons, buttons): Describe the action. “Search” beats “magnifying glass icon.”
• Complex images (charts, graphs): This means short alt + full data nearby. Alt: “Q3 revenue by region” paired with a table below.
• Decorative images: Empty alt (alt="") so screen readers skip them entirely.

What breaks alt text:

Keyword stuffing (“buy best running shoes online cheap running shoes”), repeating captions word for word, starting with “image of” or “picture of” when screen readers already announce it’s an image — these are all issues affecting alt text.

Turn off images in your browser. If critical information disappears, you’ve got an accessibility issue that needs fixing.

Utilize assistive technologies in web design

Design for keyboard, magnification, braille, and voice workflows by understanding how assistive technology works so your interface functions regardless of how people navigate.

Screen readers dominate accessibility conversations, but plenty of users never touch one. Some rely on magnifiers paired with high contrast settings. Others navigate entirely by keyboard or voice commands. So, your interface needs to function without a mouse, scale to extreme zoom levels, and respond predictably to whatever input method someone throws at it.

Start with a keyboard-first design. Every interactive element needs keyboard access with visible focus indicators. Tab order should follow reading flow, not whatever absolute positioning was created in your CSS. When modals open, focus moves into them. When they close, focus returns to the trigger. Predictable behavior keeps keyboard users from getting lost mid-task.

Handle zoom and reflow. Content needs to reflow cleanly at 200 percent zoom without horizontal scrolling or elements stacking on top of each other. Fixed-width containers break this fast, so use relative units and flexible layouts.

Voice control adds another layer. Users need visible labels that match what they say aloud. If someone says “Click submit” but your button text says “Go,” the voice command fails. Touch targets should be large enough to activate reliably.

In WCAG 2.2, Target Size (Minimum) expects targets to be at least 24 by 24 CSS pixels, with specific exceptions (e.g., spacing, inline tar exceptions). However, 44×44 is a common platform guideline.

Testing one browser-and-AT pairing isn’t enough. Something that works perfectly with NVDA on Chrome might break with JAWS on Firefox or VoiceOver on Safari. Build a test matrix covering common combinations and run critical paths quarterly. You won’t catch every edge case, but you’ll surface the breaks that affect the most users.

Test and audit for accessibility compliance

Build audits and testing into your release process so accessibility bugs surface early and stay fixed.

Annual accessibility audits are expensive theater. You hire a consultant, get back a spreadsheet with 300 violations, panic-fix everything before launch, then watch the same issues creep back in by Q3. Accessibility breaks the same way performance or security breaks: gradually, through small changes nobody caught in code review.

Automated scans find the low-hanging fruit: missing alt text, busted contrast ratios, and form fields with no labels. Run Axe or Lighthouse in your CI pipeline to catch these before they ship. But automation misses nuance, such as keyboard traps, screen reader announcements that make no sense, and focus jumping around unpredictably.

Tab through your signup and checkout flows using only a keyboard. Fire up NVDA or VoiceOver and listen to what blind users hear when they hit your product pages. Five minutes of manual testing surfaces problems that automated tools never catch.

Better yet, enforce accessibility at the component level. When your button component ships with proper focus states and keyboard handling built in, every page using it inherits the fix. You’re not chasing down the same bug across 200 pages.

Continuous monitoring catches regressions before users do. Platforms such as Siteimprove.ai can scan regularly, surface newly introduced issues, and help teams prioritize fixes based on impact. This is especially useful when you’re managing accessibility across hundreds (or thousands) of templates and components.

Stop treating accessibility like homework

Accessible design protects revenue and keeps Legal happy, but only if it’s baked into your workflow instead of showing up during annual panic audits.

The teams that get this right enforce accessibility at the component level. Buttons ship with focus states and keyboard handling built in. Color tokens meet contrast requirements by default. Automated checks in CI catch regressions the same way they catch broken builds.

Then, define who owns what: which team sets standards, how often you audit, and what the fix timeline is when issues surface. Vague accountability means nothing sticks.

Request a demo to see how design teams maintain accessibility without turning every release into a compliance fire drill.