Go to that site and put in a url of choice, and badabing!
http://www.iamcal.com/toys/colors/Wow, web developers really think about colors when it comes to designing web pages.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.