The internet is a powerful tool — but for millions of people worldwide, it isn’t always as accessible as it should be. For those who are blind or visually impaired, a poorly designed website can be more than frustrating; it can be a complete barrier to participation.
The good news? With thoughtful design and a few key practices, you can make your website welcoming, usable, and enjoyable for people with visual impairments — and in doing so, you’ll often make it better for everyone.
In this article, we’ll explore:
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Understanding visual impairments
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Adding alt text to images
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Using semantic HTML
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Ensuring good color contrast
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Making your site screen-reader friendly
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Additional tips for an inclusive experience
Let’s dive in.
1. Understanding Visual Impairments
Visual impairment is a broad term. It includes:
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Blindness — no vision at all or only light perception.
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Low vision — significant vision loss that cannot be corrected fully with glasses or contact lenses.
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Color blindness — difficulty distinguishing certain colors.
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Other visual conditions — such as cataracts, glaucoma, or macular degeneration, which can blur, distort, or dim vision.
Designing for blind and visually impaired users means thinking beyond just “seeing” — it’s about making sure your site works through multiple senses, primarily hearing and touch (via assistive devices).
2. Add Alt Text to All Images
Why It Matters
Alt text (“alternative text”) is read aloud by screen readers, describing images to someone who can’t see them. Without it, a blind user might hear only a file name like IMG_1023.jpg, which tells them nothing.
How to Write Good Alt Text
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Be descriptive but concise:
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Bad: “Image”
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Good: “Golden retriever puppy playing with a red ball on the grass.”
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Describe the purpose, not every pixel:
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If the image supports the content, explain how.
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Skip decorative images: If an image is purely decorative (like a divider line), use empty alt text (
alt="") so screen readers skip it.
Example:
Imagine a blog post about baking bread with a photo of freshly baked loaves.
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Poor alt text: “Bread”
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Good alt text: “Three loaves of homemade sourdough cooling on a wooden rack.”
Pro Tip: For infographics, provide a text summary below the image so all the information is accessible.
3. Use Semantic HTML
Why It Matters
Semantic HTML uses the right tags for the right purposes — <h1> for main headings, <h2> for subheadings, <ul> for lists, <label> for form labels, and so on. This structure helps screen readers understand and announce the content logically.
Examples of Semantic HTML in Action
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Headings: Don’t make headings by just bolding text — use proper
<h1>through<h6>tags. -
Lists: Use
<ul>or<ol>for lists so screen readers announce “list with X items.” -
Forms: Use
<label>for every input so the field’s purpose is clear.
Non-Semantic Example (Bad):
Semantic Example (Good):
Why It Helps Everyone
Search engines also love semantic HTML, so it boosts SEO while making your site more accessible.
4. Ensure Good Color Contrast
Why It Matters
Low contrast between text and background can make reading difficult for people with low vision or certain forms of color blindness — and even for sighted users in bright light.
WCAG Minimum Contrast Ratios:
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Normal text: 4.5:1
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Large text: 3:1
How to Check
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Use tools like WebAIM Contrast Checker or contrast-ratio.com.
Examples
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Poor: Light gray text on a white background.
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Good: Dark blue text on a white background.
Extra Tip: Never use color alone to convey meaning. If an error message is red, add an icon or label like “Error:” so color-blind users still understand.
5. Make Your Site Screen-Reader Friendly
Why It Matters
Screen readers (like NVDA, JAWS, and VoiceOver) translate on-screen text into speech or Braille. If your site isn’t coded and structured well, a blind user may hear confusing or incomplete information.
Best Practices for Screen Reader Accessibility
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Logical heading order:
<h1>for the page title,<h2>for main sections,<h3>for subsections, etc. -
Meaningful link text: Avoid “click here.” Instead, say “Download the annual report (PDF).”
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Skip links: Add a “Skip to main content” link so users can bypass repeated menus.
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ARIA landmarks: Use ARIA roles (like
role="navigation") to help screen readers identify sections.
Example:
A news site should allow a screen reader user to jump straight to “Main Stories” without reading the entire navigation every time.
6. Additional Tips for Inclusivity
a) Use Resizable Text
Don’t lock text sizes in pixels. Use relative units (em, %) so users can zoom in without breaking the layout.
b) Provide Audio Descriptions for Videos
If your video contains important visual details (like charts or actions), offer an audio-described version that narrates those elements.
c) Keep Layouts Simple and Predictable
Consistent navigation, clear headings, and minimal clutter help all users — especially those with low vision.
d) Avoid Auto-Playing Content
Sudden sounds can disorient screen reader users, and fast-moving visuals can be distracting for those with vision issues.
e) Test Your Site
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Try browsing with a screen reader.
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Zoom your site to 200% and check if it’s still usable.
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Run automated checks with WAVE or Lighthouse.
Why This Matters Beyond Accessibility
When you design for blind and visually impaired users, you’re not just doing the right thing — you’re also:
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Expanding your audience to millions of potential visitors.
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Improving your SEO and search rankings.
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Creating a cleaner, more organized site that’s easier for everyone to use.
Final Thoughts
Blind and visually impaired users shouldn’t have to fight to access your website. By:
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Adding descriptive alt text
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Using semantic HTML
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Ensuring good color contrast
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Making your site screen-reader friendly
…you make the web a more inclusive place — and you make your site more user-friendly for everyone else, too.
Accessibility isn’t an “extra.” It’s a fundamental part of good design. And when you commit to it, you’re not just following guidelines — you’re showing that you care about every single visitor who comes to your site.
