About Color Blindness & Vision Deficiency Simulator
Accurately simulate Protanopia, Deuteranopia, Tritanopia, and Achromatopsia for design palettes and uploaded images using Brettel/Viénot LMS matrices. Processed entirely client-side.
Key Capabilities & Features
- Simulates 8 distinct color deficiencies
- Brettel/Viénot LMS transformation matrices
- Side-by-side simulated color swatches
- HTML5 Canvas drag-and-drop image simulator
- Zero server uploads for graphics confidentiality
How to Use Color Blindness & Vision Deficiency Simulator
Choose Color or Image
Enter any HEX color code or drag & drop an interface screenshot.
Select Deficiency
Toggle between Protanopia, Deuteranopia, Tritanopia, or Achromatopsia.
Audit Accessibility
Verify that key information is distinguishable without relying solely on color hue.
Privacy & In-Browser Execution Guarantee
Image files and color values are transformed in browser memory via HTML5 Canvas. No media is ever sent across the network.
Frequently Asked Questions
What is Deuteranopia vs Protanopia?
Deuteranopia is red-green color blindness caused by missing M-cones (green), while Protanopia is caused by missing L-cones (red). Together they affect approximately 8% of males.
Can I test full interface screenshots?
Yes. Drop any PNG, JPG, or WebP screenshot into the canvas simulator to view the entire layout as perceived by people with color vision deficiencies.
Why does WCAG require alternatives to color alone?
WCAG SC 1.4.1 (Use of Color) specifies that color should not be used as the only visual means of conveying information, indicating an action, or distinguishing a visual element.