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User quotes:
Absolutely Brilliant! Thank you for an absolutely incredible site. I have always known that I was red/green colourblind, but using your site I have successfully diagnosed myself as a protanope. The example pictures were absolutely spot on. At long last, when people ask me what it's like, I can show them rather than attempting to describe it. I hope that website and software designers alike will begin to use the tools you offer.
-Simon W.
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Try Vischeck on Your Image Files

Your Results:
Original Image Deuteranope Simulation
original image deuteranope simulation

Select the type of color vision to simulate:

deutan hats Deuteranope (a form of red/green color deficit)
protan hats Protanope (another form of red/green color deficit)
tritan hats Tritanope (a blue/yellow deficit- very rare)

Image file:


  • Vischeck accepts most common image formats. However, we recommend that you use PNG or JPEG format for uploading large images as these tend to transfer faster.
  • For PowerPoint slides, you can save all your slides as PNG images with "Save As..." and run Vischeck on each slide.
  • If you have many images to process, consider downloading Vischeck to run on your own computer.)
  • Uploading a large file may take a while - please be patient!

Privacy policy. Contact: Last modified 2014-Feb-04 23:11 GMT.