I'm a little colorblind, and I tried the -colorBlind switch, but it didn't do anything for me. So, after some searching here, I found that I could probably just edit the on-map icons myself. I found them, and started playing with it, and I think that will work.
But, while looking at the map icon BMPs, I found that there are slightly different shades of some units (like infantry). I had not noticed this while playing, and I haven't found in the manual what the different shades represent.
Do these shades mean something important?