Title: Accessibility in Design Systems: Building from Scratch
Introduction
In an increasingly digital world, accessibility is more than just a legal requirement—it’s an essential foundation for inclusive and user-centered design. Every component, page layout, and interaction within a design system should cater to users of all abilities, ensuring that no one is left behind. When building a design system from scratch, prioritizing accessibility is not only a responsible decision but a strategic advantage.
Design systems serve as the blueprint for digital products, enabling consistency, scalability, and efficiency across teams. However, if accessibility isn't embedded into the design system from the outset, it often results in costly retrofitting, fragmented user experiences, and barriers for people with disabilities.
This in-depth guide explores how to build accessible design systems from the ground up, the importance of inclusive design practices, and how tools like allyWay can support and streamline accessibility efforts across web and app development workflows.
What Is a Design System?
A design system is a collection of reusable components, standards, and documentation used to guide product design and development. It typically includes:
- Design tokens (colors, spacing, typography)
- UI components (buttons, forms, tables)
- Accessibility guidelines
- Code standards and integrations
- Brand voice and design principles
While many organizations focus on visual consistency and development speed, accessibility is often treated as an afterthought. Embedding accessibility requirements during the early stages of design system development ensures inclusive user experiences from day one.
Why Accessibility Matters in Design Systems
Accessibility isn’t optional—it’s a digital necessity.
Over 1 billion people worldwide experience some form of disability. Ignoring accessibility means excluding a significant portion of potential users. Moreover, accessibility is increasingly a legal obligation under laws like:
- ADA (Americans with Disabilities Act) in the US
- WCAG (Web Content Accessibility Guidelines) internationally acknowledged
- EN 301 549 in the EU
- EAA (European Accessibility Act) coming into full force in 2025
- Section 508 in the US Federal Government
Design systems that follow accessibility best practices help organizations build digital products that cater to legal requirements, support brand reputation, and offer seamless experiences to everyone, regardless of ability.
Building Accessibility into Design System Foundations
Building accessibility into a design system from scratch means embedding best practices at every level—from color contrast to keyboard navigation. Here's how to make it work.
1. Accessibility as a Core Design Principle
Accessibility should guide every decision in the design process. It should be documented as a pillar of the design system's philosophy, akin to visual consistency or user-centered design.
Ways to integrate accessibility:
- Develop and document accessibility principles
- Establish inclusive design standards
- Assign accessibility champions across design and dev teams
- Conduct accessibility testing at every stage
2. Components Designed for Inclusive Use
Components should be built with accessibility baked in, not added later. This includes semantic HTML, accessible name computations, keyboard interactions, ARIA attributes, and proper labeling.
Common accessible components:
| Component | Accessibility Considerations |
|---|---|
| Buttons | Use <button> elements, provide aria-labels |
| Forms | Label all inputs properly, include error validation |
| Modal Dialogs | Trap focus, allow Escape key to close |
| Accordions | Use ARIA-expanded, ensure keyboard navigation |
| Tables | Use <th> for headers, define scope roles |
3. Token-Level Accessibility Support
Design tokens like font size, color, and spacing significantly impact accessibility.
Recommended token-level practices:
- Use scalable font units (rem/em) for readability
- Ensure sufficient color contrast (WCAG AA: 4.5:1 for normal text)
- Avoid relying solely on color to convey meaning
- Ensure hit areas for touch UI meet minimum size (48px by 48px)
Color token example:
| Token Name | Example Value | Accessibility Usage |
|---|---|---|
| primaryColor | #0055FF | Ensure 4.5:1 contrast |
| errorColor | #FF3333 | Pair with icon or label |
| borderRadius | 4px | Aesthetic, not critical |
Accessibility Standards to Follow
Web Content Accessibility Guidelines (WCAG)
The WCAG provides globally recognized standards for digital accessibility. Key principles include:
- Perceivable: Information is presentable to all senses
- Operable: Interface can be used via various input methods
- Understandable: Content is readable and predictable
- Robust: Compatible with assistive technologies
Versions like WCAG 2.1 AA are often referenced in legal frameworks, making compliance highly beneficial.
EN 301 549 and EAA
EN 301 549 applies to public sector websites and apps in the EU. It mandates WCAG 2.1 compliance and forms the accessibility backbone of the upcoming European Accessibility Act (EAA), which will extend regulations to private sector digital products across the EU by 2025.
To future-proof your design system, aligning with EN 301 549 and WCAG now is a wise long-term investment.
Steps to Build an Accessible Design System from Scratch
Creating an accessible design system involves a structured, iterative process. Here’s a roadmap to guide your journey.
Step 1: Research and Plan
- Benchmark existing design systems and accessibility specs
- Involve users with disabilities during user research
- Define key accessibility goals
- Identify tools like color contrast checkers and audit platforms
Step 2: Define Your Accessibility Checklist
Build a checklist aligned with WCAG and your organization's standards:
- All UI elements are keyboard-accessible
- All interactive elements have visible focus states
- Text alternatives are provided for non-text content
- Sufficient color contrast across all components
- Use of semantic HTML where applicable
Downloadable checklists or tools like allyWay’s AI-powered audit feature can offer automated assessments to support your manual efforts.
Step 3: Build Component Libraries with ARIA and Semantic HTML
Progressively enhance each component:
- Start with native semantic elements (
<button>,<a>,<select>) - Apply ARIA roles only when needed
- Design interactions for keyboard and screen reader support
- Define clear focus styles and logical tab orders
Step 4: Document for Developers and Designers
Great components are only useful if implemented correctly. Documentation should include:
- Accessibility do’s and don’ts
- Code snippets with accessible attributes
- Interactive examples
- Edge cases for cognitive, motor, and visual impairments
Documentation should evolve continually with direct feedback loops from QA and real users.
Step 5: Test with Real Users and Tools
Testing is non-negotiable:
- Conduct usability testing including users with disabilities
- Use accessibility testing tools like axe, Lighthouse, or allyWay
- Run automated tests during CI/CD
- Schedule periodic manual accessibility audits
How allyWay Enhances Accessibility in Design Systems
When building accessibility from scratch, support tools can boost efficiency, scalability, and coverage. This is where allyWay comes in.
allyWay is more than just an automated accessibility add-on—it's an accessibility support and optimization platform built for serious digital products.
allyWay: Features that Support Accessibility from Day One
| Feature | Accessibility Benefit |
|---|---|
| ✔ 30+ Accessibility Features | Addresses diverse needs (visual, cognitive, motor) |
| ✔ 5 Accessibility Profiles | Preset experiences for common disabilities |
| ✔ AI-Powered Accessibility Audits | Helps proactively detect barriers |
| ✔ Supports 35+ Languages | Enhances inclusion across global audiences |
| ✔ Works on Sites and Apps | Scalable to both web and single-page applications |
allyWay Accessibility Profiles
These profiles can be especially powerful when building inclusive systems:
- Visually Impaired Mode
- Cognitive Disability Profile
- ADHD Friendly Profile
- Seizure Safe Mode
- Motor Impaired Profile
By integrating allyWay with a design system, organizations can offer real-time accessibility enhancements while following long-term WCAG-aligned design practices.
The Business Case for Accessibility in Design Systems
Many businesses treat accessibility as a compliance checkbox. But forward-thinking organizations are now recognizing accessibility as:
- A market opportunity: Accessible experiences welcome a wider customer base
- An SEO benefit: Accessibility improves site structure and usability metrics
- A brand strength: Showcases commitment to diversity, equity, and inclusion
- A design efficiency: Fewer retrofits, fewer reworks, and more consistency
Investing in accessible design systems is not just preferable—it’s profitable.
Common Accessibility Pitfalls in Design Systems
Avoiding common mistakes can save time, money, and frustration later.
Top Errors to Watch For:
- Color contrast failures
- Absence of visible focus indicators
- Non-semantic or div-based interactions
- Lack of keyboard operability
- Missing alt text in icon systems
- Poor documentation on accessible usage
Using accessibility tools like allyWay helps flag these issues and reduce common barriers before they reach users.
FAQ: Building Accessible Design Systems
Q1: Do design systems enforce accessibility automatically?
A: No, but they set strong standards. Embedding accessibility into components and tools like allyWay ensures better implementation across projects.
Q2: Does allyWay guarantee compliance with WCAG or ADA?
A: While ally
