Black goes with every color imaginable, not only white or light blue. Black along with brighter colors when done right can look very sharp. I've no clue, msulinski, where you get the idea that wearing black would limit color choices in any way. Also, every man I've ever known owns black shoes, often in several degrees of formality, from dress to office to casual.
OP, I would urge you to seek men's style advice outside of this forum, as you are not likely to get any adivce from well-dressed men. The previously-mentioend askandyaboutclothes.com and styleforum.net are good places to go.
There are men who read and comment on Ehell, and to assume they know nothing about appropriate style is indeed insulting and offensive. As others have stated, it is wise to avoid making sweeping generalizations.
OP, WillyNilly's suggestion of slacks is a good one, and others have given good tips as well. Perhaps once your husband has some pieces in his wardrobe that are between a full suit and jeans, it'll be easier for him to choose appropriate dress for all occasions. By the way, have you seen closet rod labels? You could help him section off his closet into categories to make it even easier to choose! http://www.containerstore.com/shop/closet/hangers/hangerAccessories?productId=10020983
Also, NutellaNut, Garanimals
And BioformCassie, I didn't know that little fact, but that is awesome! What a perfect solution for colorblindness. I have a few colorblind friends who would probably appreciate such a system in their grown-up clothes.