The legend and map colors seem strange, too. I haven't really put my finger on how or why (and I'm not going to spend much time on it), but:

Everything seems dark and desaturated, as if the the only clue we have (color!) for matching things up has been deliberately reduced.

And then: It sure does feel like the legend has even more of whatever-that-is going on than the map does.

I find it difficult to look at the map and understand the information it relays at the same time.