Usually when people say they are "color blind" to racism, they don't literally mean that they are colorblind. Yellow is not brown. The idea that unless a character is stereotypically "asian" or "black" or whatever then they are either "neutral" or white is incredibly racist.
How much hand-wringing and nitpicking does it take to excuse that a bunch of pasty white actors were chosen to play Asian/Inuit characters in an Asian setting? This isn't Dragonball, where the characters are ambiguous and without nationality, having many obviously caucasian traits. It's indefensible.
Whatever: http://www.youtube.com/watch?v=wN3z257Ss2A