Real-Time Accessibility Control Engine

Real-Time Accessibility Control Engine

Beyond Static Toggles: A Working, Fully Combinatorial System.

This project is a functional, real-time control engine that handles contrast, type scaling, typography legibility, and reduced motion in any simultaneous combination — operating on a single reactive state architecture.

Key Specs & Compliance

WCAG Standard

Color contrast verified at AAA level in both modes (19.8:1–21.0:1 peak ratios)

Manual keyboard and screen-reader testing completed

Performance & Accessibility Score

95% Lighthouse Accessibility Rating

Stack

Framer · Code Overrides · Independent Frame Architecture

Verification

Manual color-contrast matrix validation & WCAG testing tools

The Challenge & Trade-offs

Scaling accessibility controls natively often forces a compromise between performance and maintainability. Enabling four independent parameters (contrast, scale, typography, motion) creates exponential state combinations (2ᴺ), making standard variant-based component architecture unsustainable to maintain and heavy to load.

The primary trade-off was architectural: bypassing component tokens in favor of independent canvas layers. While production design systems rely on structured tokens, this project prioritized lightweight, real-time reactivity directly on raw frame properties.

Live Prototype

Combine contrast, scale, typography, and motion settings in real time.

A MORE CONSIDERATE WEB

Make space for every reader.

Thoughtful accessibility choices make a page easier to read, navigate and return to. The details are where inclusion begins.

Explore the guide

Read the principles

A MORE CONSIDERATE WEB

Make space for every reader.

Thoughtful accessibility choices make a page easier to read, navigate and return to. The details are where inclusion begins.

Explore the guide

Read the principles

A MORE CONSIDERATE WEB

Make space for every reader.

Thoughtful accessibility choices make a page easier to read, navigate and return to. The details are where inclusion begins.

Explore the guide

Read the principles

The Solution

The system operates on independent canvas layers driven by centralized Framer Code Overrides. By decoupling UI structure from hardcoded visual states, shared logic dynamically manipulates CSS properties across all active variables at runtime - preserving full visual control on the canvas while enabling true combinatorial reactivity.

The system operates on independent canvas layers driven by centralized Framer Code Overrides. By decoupling UI structure from hardcoded visual states, shared logic dynamically manipulates CSS properties across all active variables at runtime - preserving full visual control on the canvas while enabling true combinatorial reactivity.

Functional & Visual Specs

1. High-Contrast Color System

Designed to provide high visual clarity while keeping the core brand identity intact across themes.

1. High-Contrast Color System

Designed to provide high visual clarity while keeping the core brand identity intact across themes.

Element

Element

Default State

(Light #FFFFFF)

Default State (Light #FFFFFF)

Light Ratio (AAA)

Light Ratio (AAA)

High-Contrast State

(Dark #000000)

High-Contrast State (Dark #000000)

Dark Ratio (AAA)

Dark Ratio (AAA)

Header (H1)

Header (H1)

#090A0C

19.8:1

#FFFFFF

21.0:1

Paragraph Text

Paragraph Text

#333842

11.7:1

#D0D5DD

14.2:1

Accent / Buttons

Accent / Buttons

#0033CC

#0033CC

8.9:1

8.9:1

#FFC800

#FFC800

13.5:1

2. Adaptive Type Scaling (+25% & +50%)

Scaled base body text from 16px up to ~20px (125%) and heading styles from 38px to ~48px without breaking Auto-Layout container boundaries or causing layout clipping. Accent labels scale proportionally from 11px to ~14px.

2. Adaptive Type Scaling (+25% & +50%)

Scaled base body text from 16px up to ~20px (125%) and heading styles from 38px to ~48px without breaking Auto-Layout container boundaries or causing layout clipping. Accent labels scale proportionally from 11px to ~14px.

3. Cohesive Readable Typography

Rather than swapping to an external typeface, legibility is enhanced by dynamically adjusting letter-spacing (tracking) and line height on the primary font. This preserves visual brand cohesion across the UI while significantly aiding readability.

3. Cohesive Readable Typography

Rather than swapping to an external typeface, legibility is enhanced by dynamically adjusting letter-spacing (tracking) and line height on the primary font. This preserves visual brand cohesion across the UI while significantly aiding readability.

4. Simulated Reduced Motion

Strips spring transitions and layout shifts, replacing them with instant state changes to mirror native prefers-reduced-motion behavior for vestibular accessibility.

4. Simulated Reduced Motion

Strips spring transitions and layout shifts, replacing them with instant state changes to mirror native prefers-reduced-motion behavior for vestibular accessibility.