Color combos for my org's symbols? The colors we use are specified and we don't use patterns. So we don't have much to choose from in terms of color combos and that's a good thing.
But I absolutely HATE black paraphernalia so I would say any black piece of clothing with a DST reference on it, or seeing the symbols outlined in black, makes me cringe.
My favorite color combo is the basic Crimson and Cream--or red and khaki substitute. I rarely do the red and white substitute but I have on occasion.