About Color Blindness & Daltonism Vision Simulator
Scientifically calibrated client-side color vision deficiency (CVD) simulator and WCAG accessibility testing studio. Accurately simulates 8 distinct types of color blindness using SVG feColorMatrix transformation filters: Deuteranopia (green-blind), Deuteranomaly (green-weak), Protanopia (red-blind), Protanomaly (red-weak), Tritanopia (blue-blind), Tritanomaly (blue-weak), and Achromatopsia (complete color blindness). Features interactive side-by-side comparison, custom photo/UI upload testing, and color palette accessibility evaluation. 100% private in-browser computation.
Key Capabilities & Features
- Simulates 8 distinct types of color vision deficiencies with scientific matrix accuracy
- Dual viewing modes: Side-by-side normal vs simulated comparison or full simulation view
- Custom design upload support: drop any screenshot, wireframe, or photo to audit accessibility
- Interactive default UI palette testing buttons, gradients, and contrasting color combinations
- Detailed medical descriptions and global population prevalence statistics for each CVD type
- Hardware-accelerated SVG filter rendering for instant 60 FPS real-time performance
How to Use Color Blindness & Daltonism Vision Simulator
Select Deficiency Type
Choose a color vision deficiency: Deuteranopia (most common), Protanopia, Tritanopia, or Achromatopsia.
Upload Image or Use Default UI
Click 'Upload Design / Photo' to test your own interface, or explore the built-in palette.
Compare Side-by-Side
Examine how buttons, alerts, and charts appear to color-blind users alongside normal vision.
Audit WCAG Accessibility
Verify whether critical UI actions remain distinct without relying solely on red/green color cues.
Privacy & In-Browser Execution Guarantee
100% Client-Side. Your images and design mockups are transformed strictly in browser memory using SVG filters without server uploads.
Frequently Asked Questions
What is the most common form of color blindness?
Deuteranomaly (green-weakness) is by far the most common form of color vision deficiency, affecting approximately 5% of all males and 0.35% of females worldwide. Together, red-green deficiencies (Deuteranopia, Deuteranomaly, Protanopia, Protanomaly) affect about 1 in 12 men and 1 in 200 women.
How does WCAG 2.1 address color blindness in web design?
WCAG Guideline 1.4.1 (Use of Color) requires that color is not used as the only visual means of conveying information, indicating an action, prompting a response, or distinguishing a visual element. Designers should always pair color cues with icons, text labels, or distinct patterns.