Understanding conformance levels of WCAG 2.2

Web Content Accessibility Guidelines or WCAG as we say has evolved over the years to address the changing landscape of technology and provide better accessibility for people with disabilities. With a sudden internet boom that happened in the late 90s, WCAG was established internationally by the World Wide Web Consortium to ensure that in the ever-changing internet landscape, inclusivity as a parameter for success is not left behind. Though the version history of WCAG isn’t very long, each version at that given period ensured that the standards of how the content is presented on the internet was maintained to cater to all the strata of the internet users, specifically for the users with disabilities.

One thing to notice in WCAG’s version history, is the time difference between the introduction on successive versions. Where it took almost ten years to introduce WCAG 2.0 from WCAG 1.0, and WCAG 2.1 from WCAG 2.0, it has taken mere five years for the introduction of WCAG 2.2. This is due to the rapidly changing internet and content generation landscape. The main difference between WCAG 2.1 guidelines and WCAG 2.2 is that WCAG 2.2 introduces 9 additional guidelines to improve accessibility for users with cognitive and learning disabilities, low vision, and limited mobility.

Though each version had it’s separate set of guidelines added over the years, one thing that has remained same throughout the versions are the conformance levels of WCAG. These are like the ten commandments for WCAG. In this blog, we are going to dive into each conformance level to get a deep insight on what does it mean for a web development company looking to provide services.

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Conformance Levels of WCAG 2.2

The conformance levels of WCAG consist of mainly three levels viz. Level A, Level AA, and Level AAA depending on the level of accessibility to be incorporated in a website. For a web development company, to decide on which conformance level to follow, is a matter of detailed analysis considering various parameters like:

• Legal and Regulatory Requirements

• Industry and Business Type

• Target Audience

• Type of Content

• Budget and Resources

Let’s understand each parameter in brief before we dive into the actual conformance levels in detail.

- Legal and Regulatory Requirements:** Evaluate the accessibility laws in your region. For instance, the ADA requires Level AA compliance in the US, the UK Equality Act 2010 encourages it, and the EU Web Accessibility Directive mandates it for public sector sites. In India, the RPWD Act recommends Level AA compliance.

- **Industry and Business Type:** The nature of your business influences the conformance level. Government and public sector websites often need Level AA or AAA. Healthcare, financial services, and educational institutions may also require higher levels of compliance.

- **Target Audience:** Your website’s audience determines the necessary accessibility level. If it serves people with disabilities, seniors, or those with low literacy, Level AAA is ideal for providing an inclusive experience. For a general audience, Level AA is usually sufficient to meet accessibility needs and legal requirements.

- **Type of Content:** The type of content you offer also affects your compliance level. Text-heavy content, like blogs and legal documents, benefits from Level AAA’s focus on readability. Multimedia content, including videos and animations, should follow Level AA, providing captions, transcripts, and alternative text.

- **Budget and Resources:** Consider your budget and development resources when selecting a conformance level. Level AA is generally achievable with a reasonable investment and ensures adequate accessibility. In contrast, Level AAA demands more extensive design changes.

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Let’s now dive into the actual conformance levels of WCAG 2.2

1. Level A:

Minimum Level

Level A includes the most basic web accessibility features, ensuring content is minimally accessible to people with disabilities. It addresses barriers that would otherwise prevent users from accessing essential content.

Users with significant disabilities, including those who rely on assistive technologies like screen readers, keyboard navigation, or voice input.

Examples of Requirements:**

• Provide alternative text for non-text content.

• Ensure all functionality is operable using a keyboard.

• Avoid content that may trigger seizures (e.g., no flashing content).

• Include labels and instructions for form fields.

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Example**

A blind user can navigate an image-based website using screen reader technology, thanks to proper alt text descriptions.

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1. Level AA:

Moderate Level

Level AA ensures web content is usable by a wider range of people, addressing more complex barriers. Most legal regulations and compliance standards (e.g., ADA in the US, EN 301 549 in the EU) require Level AA.

Users with moderate visual, hearing, motor, or cognitive disabilities.

Examples of Requirements (including WCAG 2.2 additions):**

• Maintain a contrast ratio of at least 4.5:1 for text.

• Provide resizable text without loss of functionality.

• Ensure clear navigation and logical content structure.

• Avoid time-based tasks unless necessary.

• New in WCAG 2.2: Provide accessible authentication (e.g., no cognitive tests like CAPTCHA without alternatives).

• New in WCAG 2.2: Focus visible on interactive elements with clear indicators.

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Example**

A user with low vision can read website content using a high-contrast color scheme and adjustable text size.

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1. Level AAA:

Highest Level

Level AAA represents the highest level of accessibility, providing an inclusive experience for all users, including those with severe disabilities. While it’s not a legal requirement, Level AAA is beneficial for websites that prioritize universal access, like government or healthcare sites.

Users with cognitive disabilities, low literacy, or those who require simplified content.

Examples of Requirements (including WCAG 2.2 additions):**

• Ensure a contrast ratio of at least 7:1 for text.

• Provide sign language interpretation for multimedia.

• Use simplified language and clear design.

• Offer extended audio descriptions for videos.

• New in WCAG 2.2: Provide detailed focus appearance with enhanced contrast

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Example**

A user with cognitive impairments benefits from simplified instructions and clear visual cues for navigating a government website.

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The complex question still remains as to which level to choose while developing a website? Let’s look into a quick explanation on which level of conformance to choose when.

• Level A:** Suitable for early-stage compliance, ensuring your site is somewhat accessible. However, it excludes many users with moderate or severe disabilities.

• Level AA: This is the recommended standard for most businesses, government agencies, and organizations. It ensures a balanced, inclusive experience for a wide range of users.

• Level AAA: Ideal for websites targeting maximum inclusivity, such as hospitals, educational platforms, or assistive service providers. While achieving full AAA compliance is difficult, aiming for as many AAA-level criteria as possible is a best practice.

Conclusion

In conclusion, understanding and implementing the right WCAG conformance level is crucial for creating a website. While Level A ensures a basic level of accessibility, Level AA is the most commonly required standard, balancing compliance and usability for a broad range of users. It is generally suitable for most businesses, including eCommerce, real estate, and government agencies. On the other hand, Level AAA is ideal for organizations aiming for maximum accessibility, particularly in sectors like healthcare and education. By evaluating your legal requirements, industry needs, audience, content type, and resources, you can make an informed decision on the appropriate conformance level.