Don't play it then....I personally love that map and I'm sure many others do as well. Also, this thread is better suited for the map foundry in a thread about the USA map
All of the maps vary in shade and brightness. If you personally don't like the aesthetic look of the USA Map, perhaps play a map this is darker in color, or adjust your monitor's brightness levels to make them fitting for you.
One of my friends in my "clan", the Commandos, is colorblind. He still plays. Complains a bit about some maps, but he's still pretty good. Another friend though, has a hard time telling apart the red number and the pink numbers. And he's not color blind.
the card counting script is there with a colorblind one(shows armies with the color by them). Unfortunately this would not help telling continents apart. If anyone needs this its under general discussions , then userfriendly scripts.