[pcmonk]

Man, that map is impossible to read. Even as a fairly mildly colorblind person, there's no way I can distinguish the colors.

[mikestew]

Perhaps you're not color blind enough. :-) I'm much more than mildly color blind and I can distinguish the legend items just fine. Certainly more so than most graphs/maps I see.

[troymc]

Here's an idea for a web plugin: it takes displayed colors that you have difficulty distinguishing and moves them in color space, to the point where you can distinguish them.