Yes! The color blindness point is a good one. It's amazing how 2 different colors can end up being basically the same when someone is color blind. This image (http://i.imgur.com/4IbhU9w.png) has an example.
Imagine a chart/map/whatever using the 2 colors on the left, but looking to you like the ones on the right. Not that useful.
Actually I was giving a quick talk about this stuff at work using this very example and someone in the room was colorblind and he couldn't tell there was variation in the colors in the sentence. So, basically I got immediate vindication for haranguing the designers.
Actually I was giving a quick talk about this stuff at work using this very example and someone in the room was colorblind and he couldn't tell there was variation in the colors in the sentence. So, basically I got immediate vindication for haranguing the designers.
(pie chart example http://i.imgur.com/ejAnDf5.png)