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WCAG Color Blindness & Visual Impairment Simulator

Simulate Protanopia, Deuteranopia, Tritanopia, and Achromatopsia color vision deficiencies in real-time using SVG matrix filters locally in your browser.

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Machado & Brettel Matrices

Employs peer-reviewed colorimetric transformation matrices to accurately map LMS cone sensitivity deficiencies.

Full WCAG 2.1 Conformance

Helps designers and QA engineers verify that contrast levels remain readable (4.5:1 ratio) across all color vision variants.

100% In-Browser Rendering

Every pixel is computed locally by your GPU and SVG rasterizer. Uploaded design mockups never leave your local device.

Technical Reference & Architecture Guide

WCAG Color Blindness & Visual Impairment Simulator Guide — Reference Guide

Simulate Protanopia, Deuteranopia, Tritanopia, and Achromatopsia color vision deficiencies in real-time using SVG matrix filters locally in your browser.

Key Parameters & Controls

Vision Deficiency Typeprotanopia | deuteranopia | tritanopia | achromatopsia

Color vision deficiency model applied via calibrated SVG feColorMatrix transforms.

Severity Intensitynumber (0% - 100%)

Degree of cone photopigment dysfunction ranging from mild anomalous trichromacy to full dichromacy.

Source Canvas / ImageFile | HTML5 Canvas

Input graphic image or color palette rendered with real-time SVG matrix compositing.

WCAG Minimum Contrast4.5:1 (AA) | 7:1 (AAA)

Target accessibility threshold required for compliant contrast verification.

Pro Tips & Best Practices

Common Gotchas & Troubleshooting

Upload images at high resolution (1x or 2x retina) before applying filters for crisp raster output.

Ensure modern browser hardware acceleration is enabled to support standard feColorMatrix operations.

Frequently Asked Questions

How are the color blindness matrices calculated?▼

Filters implement scientifically peer-reviewed Brettel-Vienot-Mollon and Machado colorimetric simulation algorithms.

Are my design files uploaded to cloud servers?▼

No, all SVG matrix transformations and canvas renders occur 100% locally in your browser memory.

What is the difference between Deuteranopia and Protanopia?▼

Protanopia affects long-wavelength (red) cones making reds look dark brown; Deuteranopia affects medium-wavelength (green) cones.

Can I test accessibility compliance with WCAG 2.1?▼

Yes, by inspecting the simulated palette under all deficiency modes, you can catch inaccessible color pairings before shipping.

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