Color Vision

iamcal's tool changes colors on a palette to show how different kinds of color blind users will see them.

    1 in 12 people have some sort of color deficiency. When you're designing for the web, this means that 1 in 12 people might not be able to see your site. That's alot of people. This tool helps you simulate the appearance of our site's colors for people with different color visions. Select text and background colors from the palette below, then choose a color vision mode.

thanks, interconnected

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Another color checker...

Checks any site for only one type of color deficiency tho: