Accessible Best Practices for Professionals

In the rapidly evolving world of technology, creating accessible experiences is no longer optional; it’s a necessity. As professionals, we have a responsibility to ensure that our digital products and services are usable by everyone, regardless of their abilities. Are you confident that your current practices are truly inclusive, or could you be unintentionally excluding a significant portion of your audience?

Understanding Web Content Accessibility Guidelines (WCAG)

The foundation of accessible web development lies in understanding and implementing the Web Content Accessibility Guidelines (WCAG). WCAG is a set of international standards developed by the World Wide Web Consortium (W3C) to make web content more accessible to people with disabilities. These guidelines are organized into four principles, often remembered by the acronym POUR:

• Perceivable: Information and user interface components must be presentable to users in ways they can perceive. This includes providing text alternatives for non-text content, captions for videos, and ensuring sufficient color contrast.
• Operable: User interface components and navigation must be operable. This means ensuring that all functionality is available from a keyboard, providing enough time for users to read and use content, and avoiding content that flashes more than three times per second.
• Understandable: Information and the operation of the user interface must be understandable. This involves making text readable and understandable, ensuring that content appears and operates in predictable ways, and helping users avoid and correct mistakes.
• Robust: Content must be robust enough that it can be interpreted reliably by a wide variety of user agents, including assistive technologies. This includes using valid HTML and CSS, and ensuring that elements have complete start and end tags.

Adhering to WCAG is not just about compliance; it’s about creating a better user experience for everyone. By following these guidelines, you can improve the usability of your website or application for people with disabilities, as well as for users with temporary impairments, such as those using mobile devices in bright sunlight or those with slow internet connections.

Prioritizing Keyboard Navigation and Focus Management

One of the most fundamental aspects of accessible technology is ensuring that your website or application is fully navigable using a keyboard. Many users with motor impairments rely on keyboard navigation to interact with digital content. This means that every interactive element, such as links, buttons, and form fields, should be reachable and operable using the Tab key, arrow keys, and Enter/Spacebar.

Proper focus management is crucial for keyboard users. The focus indicator, which is a visual cue that highlights the currently selected element, should be clearly visible and consistently styled throughout your website or application. Avoid removing the default focus indicator, as this can disorient keyboard users and make it difficult for them to navigate your content.

Here are some best practices for keyboard navigation and focus management:

1. Ensure a logical tab order: The tab order should follow the visual flow of the content, typically from left to right and top to bottom.
2. Provide a visible focus indicator: Use CSS to style the focus indicator to make it clearly visible, even against different backgrounds.
3. Avoid trapping the focus: Ensure that users can always exit interactive elements, such as modal windows, using the Tab key or another standard keyboard shortcut.
4. Use ARIA attributes appropriately: ARIA (Accessible Rich Internet Applications) attributes can be used to enhance the accessibility of complex user interface components, but they should be used judiciously and only when necessary.

Based on data from the 2025 WebAIM Million report, websites with fewer ARIA errors tend to have better overall accessibility scores.

Writing Effective Alternative Text for Images

Alternative text, or alt text, is a brief description of an image that is displayed when the image cannot be loaded or when a user is using a screen reader. Alt text is essential for making images accessible to people with visual impairments, as it provides them with a textual representation of the image’s content and purpose.

When writing alt text, be descriptive and concise. The alt text should accurately convey the meaning and function of the image. Avoid using generic phrases like “image” or “picture of.” Instead, describe what the image shows and why it is important in the context of the surrounding content.

Here are some tips for writing effective alt text:

• Be specific: Describe the key elements of the image and their relationships to each other.
• Be contextual: Consider the purpose of the image and how it relates to the surrounding text.
• Be concise: Keep the alt text short and to the point, typically no more than 125 characters.
• Omit redundant information: If the image is already described in the surrounding text, the alt text can be brief or even empty.
• Use empty alt text for decorative images: If an image is purely decorative and does not convey any meaningful information, use an empty alt attribute (alt=””) to signal to screen readers that the image should be ignored.

For example, instead of writing “image of logo,” write “Acme Corporation logo.” If the image is a chart showing sales data, describe the key trends and insights from the chart.

Ensuring Sufficient Color Contrast and Readability

Color contrast refers to the difference in luminance between text and its background. Insufficient color contrast can make it difficult for people with low vision or color blindness to read text on a website or application. WCAG requires a minimum contrast ratio of 4.5:1 for standard text and 3:1 for large text (18pt or 14pt bold).

To ensure sufficient color contrast, use a color contrast checker tool to verify that your color combinations meet WCAG requirements. There are many free online tools available, such as the WebAIM Contrast Checker.

In addition to color contrast, readability is also important for accessible design. Choose fonts that are easy to read and avoid using overly decorative or stylized fonts. Use sufficient line height and letter spacing to improve readability. Avoid using large blocks of text without headings or subheadings, as this can make it difficult for users to scan and understand the content.

Here are some best practices for color contrast and readability:

1. Use a color contrast checker: Verify that your color combinations meet WCAG requirements.
2. Choose readable fonts: Select fonts that are easy to read and avoid using overly decorative fonts.
3. Use sufficient line height and letter spacing: Improve readability by increasing line height and letter spacing.
4. Use headings and subheadings: Break up large blocks of text with headings and subheadings to make it easier to scan and understand the content.
5. Avoid using color alone to convey information: Color should not be the only means of conveying important information, as this can exclude people with color blindness.

Testing and Validating Accessibility Regularly

Accessibility is not a one-time fix; it’s an ongoing process that requires regular testing and validation. As your website or application evolves, it’s important to ensure that new features and content are also accessible.

There are several tools and techniques you can use to test and validate accessibility:

• Automated accessibility checkers: Use automated tools like axe DevTools or WAVE to identify common accessibility issues.
• Manual accessibility testing: Manually test your website or application using a keyboard, screen reader, and other assistive technologies.
• User testing with people with disabilities: Involve people with disabilities in your testing process to get direct feedback on the accessibility of your website or application.
• Accessibility audits: Hire an accessibility consultant to conduct a comprehensive audit of your website or application and provide recommendations for improvement.

Regular testing and validation are essential for ensuring that your website or application remains accessible over time. By incorporating accessibility testing into your development process, you can identify and fix issues early on, before they impact your users.

Conclusion

Creating accessible technology is not just a matter of compliance; it’s about creating a more inclusive and equitable digital world for everyone. By understanding and implementing WCAG, prioritizing keyboard navigation, writing effective alt text, ensuring sufficient color contrast, and testing accessibility regularly, professionals can make a significant difference in the lives of people with disabilities. Start by evaluating your current practices and identifying areas for improvement. What small change can you implement today to make your work more accessible?