POUR accessibility principles for basic web accessibility
Web accessibility is about making websites work for everyone, regardless of their abilities. Accessible web design is a complex process that needs close attention and understanding of your user’s needs. The main requirements focus on helping people with different needs:
- Visual impairments: Websites need good color contrast, text-to-speech compatibility, and proper text sizing.
- Hearing difficulties: Audio content needs text transcripts and videos need captions.
- Physical limitations: Everything should work with just a keyboard, no mouse needed.
- Cognitive challenges: Content should be clear, well-organized, and easy to understand.
- Neurological conditions: Sites should avoid flashy animations that could trigger seizures.
To understand how to implement all these requirements, let’s explore each of the POUR principles, what elements they include, and who they cater to. These principles will help you understand the main WCAG examples and areas to focus on.
Perceivable web accessibility
The accessibility standards for software are getting more and more detailed each year. Following the WCAG accessibility guidelines and the European Accessibility Act 2025, here are the core requirements for making content perceivable:
What is it about? You should provide brief text descriptions for any non-text content on your website. This means adding descriptive alt text to images, icons, buttons, and form controls.
Who it's for: People who are blind, have low vision, or use screen readers; situations where images can't be seen or loaded.
This one’s also simple. Videos need captions, audio content needs transcripts, and visual information in videos should have audio descriptions.
Who it's for: People who are deaf or hard of hearing or for situations where audio can't be played or heard clearly.
- Adaptable content structure
This requirement says that you should present your content in a way that can be displayed in different layouts without losing information or structure. This means using proper HTML headings, lists, and tables.
Who it's for: People using different devices or assistive technologies; those who need to adjust how content is displayed.
Users must be able to see and hear content clearly, including separating foreground information from backgrounds. This includes proper color contrast and audio control.
Who it's for: People with color blindness, low vision, or hearing impairments. Also, for those viewing content in challenging environments.
These requirements align with WCAG Level AA standards and the web accessibility directive. Now, let’s see the next principle in detail.
Operable digital content accessibility
Following the Web Content Accessibility Guidelines (WCAG) and European Accessibility Act 2025, here are the core requirements for making content operable:
All website functionality must be usable through a keyboard interface, with no need for specific timing for keystrokes. This means ensuring proper focus order and avoiding keyboard traps.
Who it's for: People with motor disabilities, those using alternative input devices, and users who prefer keyboard navigation.
This requirement ensures users have enough time to read and interact with content. Websites must provide options to pause, extend, or adjust time limits where they exist.
Who it's for: People with reading difficulties, cognitive disabilities, or those using assistive technologies who may need extra time.
Content should not contain elements that could trigger seizures or physical reactions. This means avoiding rapid flashing content and allowing users to disable motion animation.
Who it's for: People with photosensitive epilepsy, vestibular disorders, or those sensitive to motion.
Users need multiple ways to find content and understand where they are on a website. This includes implementing clear headings, descriptive links, and consistent navigation patterns that align with WCAG AA standards.
Who it's for: People using screen readers, those with cognitive disabilities, and anyone who needs help orienting themselves on a website.
These requirements support EAA compliance and follow the POUR accessibility principles. When developing for web accessibility, these guidelines ensure your digital content meets European compliance requirements.
Understandable web accessibility
Following the accessibility design guidelines and the European Accessibility Act 2025, here are the core requirements for making content understandable:
Your content should be clear and comprehensible. This means specifying the language of your pages and any language changes within them, explaining unusual words, abbreviations, and providing pronunciation guides when needed.
Who it's for: People learning the language, those with cognitive disabilities, and users of assistive technologies.
This requirement focuses on making your website behave in consistent, expected ways. Elements shouldn't change context automatically — whether on focus or input — and navigation should remain consistent across pages.
Who it's for: People with cognitive disabilities, those who rely on keyboard navigation, and users who need stable, predictable interfaces.
Your forms and interactive elements should help users avoid and correct mistakes. This means providing clear labels, error identification, and suggestions for fixing issues — especially crucial for legal or financial transactions.
Who it's for: People with cognitive disabilities, those who might struggle with form completion, and anyone making important online transactions.
The Understandable principle emphasizes several key aspects of web accessibility: supporting different cognitive needs through clear content, maintaining predictable interactions, preventing costly mistakes through safeguards, providing clear guidance, and ensuring consistent experiences across web pages. These elements work together to help users navigate websites confidently and effectively.
Robust principle of POUR accessibility
Following the European Accessibility Act 2025 and WCAG accessibility design guidelines, here are the essential requirements for making content robust and ensuring web accessibility development:
- Code Interpretation and parsing
Your website's code must be written precisely so that different browsers and assistive technologies can understand and present it correctly. This means following proper HTML structure, completing all tags, and maintaining clean code syntax.
Who it's for: Users relying on various browsers and devices and people using assistive technologies like screen readers. This requirement is necessary for regular audits for EAA accessibility and WCAG AA standards compliance.
- Component names and roles
What is this software accessibility standards compliance requirement about? Every interactive element on your website needs clear identification that computers can understand. This includes proper labeling of buttons, forms, and links, ensuring they communicate their purpose and current state to assistive technologies.
Who it's for: Screen reader users navigating your interface and people using alternative input devices.
Your website must communicate updates, errors, and status changes to all users without requiring them to spot visual changes. This ensures everyone stays informed about what's happening on the page.
Who it's for: Users relying on screen readers, people with cognitive disabilities, and situations where visual cues might be missed.
Robust code forms the foundation of accessible web content, ensuring your site works reliably across different technologies and user needs. In our web accessibility checklist, you will find a detailed breakdown of the WCAG POUR principles, together with guidelines on testing each element and area. Now, let’s figure out how to check if your website is really accessible and compliant.