Color Blindness Simulator
Simulate how color-blind users perceive your website designs, images, and color palettes across 7 vision deficiencies.
1. Select Vision Deficiency Condition
Designing Inclusive Digital Experiences
Over 300 million people worldwide live with color vision deficiencies. Testing digital experiences against validated physiological color matrices enables software engineers and product designers to identify ambiguous visual signifiers, optimize contrast, and comply with international digital accessibility legislation.
Accessibility Applications
- ✓UI/UX Product Design & WCAG AAA Accessibility Audits
Ensure critical dashboard status pills, success badges, and danger error messages remain distinguishable without relying solely on red and green hues.
- ✓Data Visualization & Chart Legend Contrast
Verify that analytics line charts, pie slices, and heatmap gradients remain decipherable to the 1 in 12 men affected by color vision deficiency.
- ✓E-Commerce Checkout & CTA Button Testing
Test whether 'Buy Now' and 'Add to Cart' conversion buttons blend into background layout sections for color-blind shoppers.
- ✓Marketing Campaign Graphics & Infographics
Upload finalized Figma and Canva exports to preview how visual marketing creatives appear to diverse audiences across social channels.
Key Capabilities
7 Scientifically Accurate Vision Deficiencies
Simulates Deuteranopia (green-blind), Deuteranomaly (green-weak), Protanopia (red-blind), Protanomaly, Tritanopia (blue-blind), and Achromatopsia (monochrome).
Direct Image & Screenshot Uploads
Upload high-resolution PNG or JPEG mockups with real-time browser-rendered SVG color matrix filters with zero lag.
Side-by-Side Split View
Directly compare the original trichromacy image against the simulated color-blind output for instant design diagnosis.
100% Client-Side Privacy
All image rendering and filter computations execute strictly in your local browser memory; uploaded images are never stored or transmitted.
Frequently Asked Questions
What is the most common form of color blindness?
Deuteranomaly (reduced sensitivity to green light) and Deuteranopia (complete lack of green cones) are the most common, affecting approximately 6% of males of Northern European descent. In total, roughly 8% of men and 0.5% of women worldwide experience red-green color vision deficiency.
What does WCAG Guideline 1.4.1 (Use of Color) require?
WCAG 2.1 Guideline 1.4.1 mandates that color cannot be used as the only visual means of conveying information, indicating an action, prompting a response, or distinguishing a visual element. Designers must supplement color with icons, text labels, underlines, or distinct patterns.
Why do red and green buttons fail accessibility standards?
To individuals with Deuteranopia or Protanopia, pure red and pure green appear as virtually identical shades of brownish-yellow. If an app uses a green button for 'Confirm' and an identical red button for 'Cancel' without clear text icons, users cannot distinguish between them.
What is Achromatopsia?
Achromatopsia is complete color blindness (monochromacy), where an individual perceives only shades of black, white, and gray. It is very rare (affecting roughly 1 in 30,000 people). Designing with strong luminosity contrast ensures readability for all users.
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