I wear Black Watch quite often. For me it is a kilt that is attractive yet doesnt have many other colors to deal with. What I dont do is use much green with it as the main color is a green. You are pretty free to use what you like within reason. Claret, burgundy, light blues, steel gray, reds (though to me to Christmasy), and khaki all go well. I often wear mine with brown tweed with blue top stripe kilt hose and find a blue or beige shirt to go with it. If you are dressing up a wasitcoat would work well, even a black jacket as long as you dont wear a black shirt. Either work with the color in your shirt and kilt hose or your kilt hose and tie. Lots of breadth here so it depends on what you like in color....