Snoopy, I appreciate, and sympathize completely with, your problem. It's often struck me as ironic that our society makes so many genuine, well-intentioned efforts to accommodate the disabilities of people in wheelchairs, the deaf, and the blind - but scarcely anybody ever mentions color blindness in that context. It afflicts millions of peole and can, in certain situations, be a genuine disability.
My father, who made his living for about fifty years as an architect (and had a thorough understanding of color as an objective subject), was "red/green color blind." He found that out when, in (I think) 1930, he got a Congressional appointment to the Naval Academy. He came in first on the competetive exam, and the Navy bought his train ticket to Annapolis. There the medics gave him a physical, and discovered the color blindness. (It was news to Dad.) That did it; he was washed out. He told me, fifty years later, that walking down the steps of Bancroft Hall after that physical was the worst moment of his life.
When WWII started, Dad enlisted in the Navy. Shortly thereafter he encountered a doctor who claimed he knew some exercises that would cure color blindness. The "exercises" consisted of letting Dad take the standardized test over and over again until he memorized it. So, having convinced the Navy that he really wasn't color blind, he got a commission and was stationed on board an attack transport (U.S.S. Bollinger, APA 234) in the Pacific. He said (long afteward) that he eventually concluded the Navy had been right: he just couldn't see things as well as other people.
Given the mortality rate of the Annapolis class of 1934 (which Dad would have been in), it's often occurred to me that his color blindness just may have made me possible.
All of which is a long way from the Missouri; sorry about that.
The good news is that the ship's 1991 color scheme actually ought to be relatively easy for a color-blind eye to sort out. There are, in essence, just four colors: haze grey, deck grey, teak, and black.
The typical bottom treatment for a ship like this consists of dark red anti-fouling paint on the underwater hull and a black stripe separating the red from the above-water grey. The width of the black stripe seems to vary quite a bit from ship to ship, but on a waterline model that black "waterline plate" should look just about right.
One of the golden rules of serious plastic modeling is "paint everything." But if you left the edges of that plate unpainted I suspect few people would notice - assuming the fit with the hull is good.
If you're going to build the model with a full hull, you'll want to paint the underwater hull piece dark red and add the black stripe along the top of it. You'll need to check reference photos to get the width of the black stripe (or maybe somebody else in the Forum knows what it should be).
If you do decide to build another Missouri in an earlier configuration, I can recommend the Tamiya kit enthusiastically. It shows her as she looked in 1945 - and contains color guides (printed in color, that is) for the two color schemes she wore during the war. It's a beautiful kit.