Colorblind is a iPhone/iPad game, that might just be useful for some digital artists that could use training on thier color picking.
The game requires you to look at a color swatch and then match it from memory using only RGB sliders. That's all there is to it. Sounds easy, but unless you have a lot of experience building colors using just RGB, I'm sure you'll be challenged. Kotaku has a great video review of it and shows the game in action. I posted this for you all to consider as this highlights one advanced skill that game artists need to be masters of in a small contained app. Consider it homework for when you are sitting on the porcelain throne.
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I'm curious as to how many digital artists have the problem, as it's pretty widespread.