As a colour blind person I appreciate the attempt, but this system does absolutely nothing to help me. The kind of place where my colour blindness is an issue, would be a map like this one <a href="http://strangemaps.files.wordpress.com/2008/12/jeoparmap.jpg?w=687&#38;h=551" rel="nofollow">http://strangemaps.files.wordpress.com/2008/12/jeoparmap.jpg...</a> where Trebekkies and Casual kibitzers are the exact same colour to me. Go ahead and label them as `/ and / in the legend, it doesn't help me in the slightest to determine where I need to go in the US to engage in a lively conversation about Jeopardy.<p>To really help people with colour blindness, I recommend that before you publish anything, do this to it. <a href="http://erik.wiffin.com/stuff/graymap.jpg" rel="nofollow">http://erik.wiffin.com/stuff/graymap.jpg</a> If you can see the difference between all of the categories, then so can I.