Like many I'm red/green colourblind(the most common form), which in most games gives me a great disadvantage. Could either colour be replaced with solid black or white?
No. What you could do is download greasemonkey (colourblind version). Get Firefox, go to General Discussion, go to the Sticky, check the first link, get GreaseMonkey, then get the colourblind band-aid.
In heaven... Everything is fine, in heaven... Everything is fine, in heaven... Everything is fine... You got your things, and I've got mine.
its nice, i aint colorblind though so i turned the colorblind part off but what it does is just put the first letter of the color before each number (so a territory belonging to red with 4 armies says r4)