Websites are essential gateways to knowledge, services, education, and commerce. However, for millions of individuals with disabilities, these gateways often remain partially or entirely inaccessible due to poor web accessibility practices.

Web accessibility ensures that all users, regardless of their abilities or limitations, can perceive, navigate, and interact with web content effectively. The Web Content Accessibility Guidelines (WCAG), established by the W3C, provide comprehensive standards to guide developers and designers in creating accessible digital experiences. Yet, despite widespread awareness, many websites continue to exhibit repeated accessibility failures, preventing users with disabilities from fully engaging with online content.

Here we discuss the most common web accessibility mistakes in detail. Let’s dive in.

Insufficient Color Contrast

Understanding the Issue

Color contrast refers to the visual difference between text and background or between interactive elements and surrounding content. Insufficient contrast occurs when the foreground and background colors are too similar, making text or controls hard to see. While it may seem like a minor aesthetic detail, contrast is fundamental for accessibility.

According to WCAG 2.1 guidelines:

• Normal text must have a minimum contrast ratio of 4.5:1
• Large text (18pt or larger, or 14pt bold) must have a minimum contrast ratio of 3:1

Despite this, many websites use light gray text on white backgrounds, pastel colors for buttons, or subtle shades for links, practices that hinder readability for users with low vision or color blindness.

Real-World Impact

Consider a scenario where a visually impaired user attempts to read a critical alert message about a payment error. If the text is a light gray on a white background, the user may not notice it, leading to errors or abandoned transactions. Similarly, users with color vision deficiencies may miss status indicators, warnings, or navigational cues.

How to Fix It

1. Use Contrast Checkers: Tools like Contrast Checker, Accessible Colors, or browser extensions can help ensure compliance.
2. Test Across Devices: Contrast can vary on monitors, tablets, and smartphones. Always test in real-world settings.
3. Avoid Aesthetic Compromises: While design trends may favor subtle tones, prioritize readability over style.
4. Ensure Interactive Elements Stand Out: Links, buttons, and form fields must have sufficient contrast against their background.

By addressing contrast issues, websites can drastically improve readability and usability for users with visual impairments. You can read our most recent blog post about the importance of color contrast and readability for all users.

Missing or Inadequate Alternative Text

Understanding the Issue

Alternative text (alt text) is a textual description added to images that enables screen readers to convey the purpose of the image to visually impaired users. Without it, non-text content is inaccessible, and users miss vital information.

Alt text should describe the purpose and context of the image, not just its appearance. Decorative images should have empty alt attributes (alt="") to prevent unnecessary clutter for screen reader users.

Real-World Impact

Imagine an online store where product images lack alt text. A blind user using a screen reader cannot identify products, making online shopping nearly impossible. Similarly, charts, graphs, and infographics without alt text exclude users from understanding key insights.

How to Fix It

1. Provide Meaningful Descriptions: Describe the image’s purpose succinctly. For example, alt="Red running shoes, size 10, available in stock"
2. Avoid Redundant Phrases: Do not prefix with “image of” or “graphic of.”
3. Use Empty Alt Text for Decoration: Decorative visuals should not interrupt screen reader flow.
4. Implement ARIA Labels Where Necessary: For images serving as buttons or interactive elements, ARIA labels can convey meaning.

Proper alt text ensures all users, regardless of vision, can access your content fully.

Lack of Keyboard Accessibility

Understanding the Issue

Keyboard accessibility ensures users can navigate a website without a mouse. This is essential for individuals with motor impairments, visual disabilities, or those who rely on alternative input devices.

Common barriers include:

• Non-focusable elements
• “Keyboard traps," where users cannot exit a component using the keyboard
• Dynamic content, modals, and dropdowns that are not fully accessible

Real-World Impact

A user with limited mobility trying to fill a form may be unable to reach submit buttons if the tab order is broken. Menus or modal pop-ups that are inaccessible via keyboard prevent navigation entirely.

How to Fix It

1. Ensure All Interactive Elements Are Focusable: All buttons, links, and form fields should be reachable via the Tab key.
2. Maintain Logical Tab Order: The tab sequence should follow visual and semantic hierarchy.
3. Provide Focus Indicators: Visible outlines or highlights indicate which element is active.
4. Test with Real Devices and Assistive Tools: Use keyboard-only navigation and screen readers to ensure usability.

Implementing keyboard accessibility improves usability for all users, not just those with disabilities.

Improperly Structured Forms

Understanding the Issue

Forms are vital for interaction, sign-ups, feedback, and payments but are often poorly structured. Missing labels, unclear instructions, and improper field grouping can make forms inaccessible.

Real-World Impact

Screen reader users may not know what input is required, leading to incomplete or incorrect submissions. For instance, a user filling out a credit card form may miss an instruction about the CVV code.

How to Fix It

1. Use <label> Elements: Each input field should have a corresponding label connected via the for attribute.
2. Group Related Fields with <fieldset> and <legend>: This clarifies grouped information like address or payment details.
3. Provide Clear Instructions and Error Messages: Make errors explicit and guide users to correct them.
4. Test With Screen Readers: Ensure all instructions are read aloud and form navigation is logical.

Accessible forms significantly enhance usability and reduce abandonment rates.

Non-Descriptive Links and Buttons

Understanding the Issue

Links and buttons with vague text such as “Click here” or “Learn more” provide no meaningful context. Similarly, icon-only buttons without ARIA labels are inaccessible.

Real-World Impact

Screen reader users often navigate by a list of links. Vague labels make it difficult to understand the purpose of links or buttons, causing confusion and frustration.

How to Fix It

1. Use Context-Rich Text: Link and button text should describe the action. For example, “Download the 2026 Accessibility Report” instead of “Click here.”
2. Add ARIA Labels for Icons: Ensure icon-only buttons convey purpose to screen readers.
3. Avoid Ambiguous Phrases: Replace generic text like “More info” with descriptive alternatives.

Proper link and button labeling improves both accessibility and SEO.

Incorrect Use of Headings and Structure

Understanding the Issue

Headings organize content, providing structure and meaning for all users, especially screen reader users. Misuse of headings, skipped levels, or using headings purely for styling disrupts content flow.

Real-World Impact

Screen reader users rely on headings to scan and navigate pages efficiently. Improper heading structures can make it nearly impossible to locate critical content.

How to Fix It

1. Follow Hierarchical Order: H1 → H2 → H3 → H4
2. Use Headings for Structure, Not Styling: Don’t use headings solely to make text larger or bold.
3. Avoid Skipping Levels: Maintain logical nesting of headings.
4. Validate with Accessibility Tools: Ensure headings are semantically correct.

A structured heading hierarchy enhances readability and accessibility simultaneously.

Conveying Information Through Color Alone

Understanding the Issue

Websites often use color alone to convey meaning, such as red text for errors or green for success messages. This practice excludes users with color vision deficiencies.

Real-World Impact

Users unable to perceive color differences may miss critical alerts or instructions. For instance, a form field highlighted in red for errors may not communicate the issue effectively.

How to Fix It

1. Combine Color With Text Labels: Include explicit text like “Error: Required field missing.”
2. Use Icons or Patterns: For visual cues, combine shapes or patterns with color.
3. Test with Color Blindness Simulators: Ensure information is perceivable without color reliance.

Absence of Skip Navigation Mechanisms

Understanding the Issue

Skip navigation links allow keyboard users and screen reader users to bypass repetitive menus and reach the main content directly.

Real-World Impact

Without skip links, users must tab through multiple navigation links on every page, increasing cognitive load and navigation time.

How to Fix It

1. Add “Skip to Main Content” Links: Place at the top of pages.
2. Ensure Visibility on Focus: Make skip links appear when active.
3. Test With Keyboard Navigation: Verify functionality across all pages.

Skip navigation links dramatically improve usability for assistive technology users.

Small or Poorly Spaced Interactive Elements

Understanding the Issue

Interactive elements that are too small or too close together create difficulties for users with limited dexterity or mobility.

Real-World Impact

A user may click the wrong button on mobile devices, leading to errors and frustration. Small targets affect both users with motor impairments and older users.

How to Fix It

1. Maintain Minimum Target Size: WCAG recommends 44×44 pixels.
2. Add Adequate Spacing: Prevent accidental clicks.
3. Optimize for Mobile: Touch targets should be comfortable for finger tapping.

Lack of Semantic HTML and ARIA Misuse

Understanding the Issue

Semantic HTML conveys meaning to assistive technologies. Misusing ARIA or overcomplicating markup can confuse screen readers.

Real-World Impact

Users may encounter misleading or incomplete information. Navigation can become unintuitive if elements are improperly labeled.

How to Fix It

1. Use Native HTML Elements: <header>, <main>, <nav>, <button>, <form>
2. Apply ARIA Only When Necessary: Don’t overuse ARIA roles.
3. Validate Semantic Structure: Use tools like WAVE or Axe to check code.

Frequently Asked Questions

• What is the most common web accessibility mistake?
  Low color contrast, missing alt text, and poor keyboard navigation are among the most common issues. 
• Why do websites fail WCAG compliance?
  Lack of awareness, accessibility being an afterthought, insufficient testing, and over-reliance on automated tools.
• How can I test my website for accessibility?
  Combine automated tools (WAVE, Axe) with manual testing, keyboard navigation, and screen readers like NVDA or VoiceOver.
• Are accessibility fixes expensive?
  Early integration in design is cost-effective. Retrofitting an inaccessible site can be more expensive but prioritizing high-impact issues reduces cost.
• Does accessibility improve SEO?
  Yes. Accessibility practices like semantic HTML, proper headings, and alt text improve search engine visibility.‍
• Who benefits from web accessibility?
  Everyone. Users with disabilities, older adults, mobile users, and anyone in non-ideal viewing conditions benefit from accessible websites.