Protan & Deutan
Color Blindness Simulator & A11y Tester
Ensure your designs and visual assets are accessible to everyone. Test images and palettes against Protanopia, Deuteranopia, Tritanopia, and Achromatopsia.
Color Blindness Simulator & Accessibility CheckerSVG Color Matrix
Test how your images, charts, and brand color palettes appear to users with Protanopia, Deuteranopia, or Tritanopia.
Original (Normal Trichromacy)100% Color Gamut
Default Palette Sample
#ef4444
#f97316
#eab308
#22c55e
#3b82f6
#a855f7
Simulated: Deuteranopia (Green-Blind)Filtered View
Simulated Perception
#ef4444
#f97316
#eab308
#22c55e
#3b82f6
#a855f7
Protanopia, Deuteranopia & Tritanopia
Total Achromatopsia Grayscale
Side-by-Side Live Comparison
Zero Server Image Uploads
How to Use Color Blindness Simulator & Palette Accessibility Checker (Step-by-Step Guide)
No software installation required. Complete your task in 3 easy steps directly in your browser.
1
Upload Image or Use Palette
Select any UI screenshot, chart, or image, or test with default swatches.
2
Select Visual Deficiency
Switch between Protanopia, Deuteranopia, Tritanopia, and Achromatopsia.
3
Compare Side-by-Side
Inspect the transformed visual colors to ensure contrast and readability.
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Got Questions?
Frequently Asked Questions
Deuteranopia (green-weak/green-blind) affects approximately 5% of males, making red-green distinctions difficult.