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Wow! This is an amazing site!! Finally, after 18 years, I could understand how my brother sees the world. He wants to be a designer and the fact that he's color-blind, is an obstacle for him. It's unbelievable how color-blind people can see things we don't and vice-versa. I found a program called 'whatcolor?' ( It's been really helpfull for him. Thank you so much !!
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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.