Thanks for the information. I was hoping for an answer relating to cartography and your response is great!
I personally don't think the colours as they are are inappropriate, the maps look great. I love the information that comes back when I click, and the 'about the map' information is very interesting, it captures my attention and has me exploring more.
I've just heard in some peoples arguments (because there are people who are sensitive to such an issue) that they have been offended by colours shown on maps. Ethnic thematic maps in particular.
I've experienced this sensitivity first hand, so I notice associative colours immediately now and always like to explore the rational behind using those colours. I haven't seen a map (modern) yet where the colours were in fact chosen for that negative effect. That's just what the result was for some viewers.
My experience was when a contractor brought a map he'd made to a meeting showing our Indian Reserve in red. Short story, that meeting didn't go well and he never got the information he came for. The maps were for a land use and occupancy survey/interview. A single person took offence, and this caused the group to begin thinking critically. It was indeed unfair, because that was not his intention, but it did happened.