1. The problem with colour-blind people is that there is no fixed rule. My ex-boss *thought* he could distinguish some colours pretty accurately, and one said pointed to a blue plastic table, telling me: "See? I know for instance this table is red." Right. A friend of mine saw everything in shades of grey. RGB(FF,0,0) and RGB(0,0,FF) were the same to her.
   I see that advanced is blue and expert red, well my ex-boss would have a fine time doing both, :-)
     posted by dda at 01:06:19 PM on December 18, 2004  
2. Well, there are several kinds of color blindness... see here more info: http://en.wikipedia.org/wiki/Color_blindness
   
   Myself, I'm red-green color blind. I wrote about this before: http://zephyrfalcon.org/weblog/arch_d7_2003_05_31.html#e245. The "demo" mentioned on that page still works. Apparently it's quite baffling to "normal" people that I see hardly any difference between the normal and the protan fire trucks. :-)
     posted by Hans Nowak at 01:36:07 PM on December 18, 2004