No this is not another version of our beloved Blender, it is however a great tool for the color challenged. Though I'm not so bad as to mix plaids and stripes, I do not have a formal art education and I am a bit color challenged (just ask my teenage daughter). If you're looking to find complementary colors for your primary color or create a nice palate to work from, the ColorBlender tool will be a tremendous help to you.
With ColorBlender you can choose to make your own palate selection of colors by either moving the RGB/HSV sliders or entering the values. You can also pick from hundreds of choices that have been submitted by other users. and If you do create your own palate, you can save it for future use and email right from the site should you need to send it to someone.
And on your palate travels you might start trying to figure out why there is sometimes a difference in RGB values, for example between Photoshop and Blender. Here's what I learned from http://www.dmu.com/bbgtut/bbg34.html. Note - this seems to be Blender related tutorial game making site that I found VIA Google. I could not find the name of the author of it but you Blender Gamers might want to check it out:
Why use a decimal rather then the more traditional 0->255? Using 0->255 or the RGB values only allows 256 different values. Using a decimal allows for an almost infinite number of possibilities i.e.: 0.5, 0.55, 0.5498734Hot Pink = 255, 0, 128
To convert from 0 to 255 RGB values to 0 ->1 RGB values divide by 256
R = 255 / 256 = 1, G = 0/256 = 0, B = 128/256 = 0.5