Black is a good base.
Black hose w/(black) flashes would be fine, but then I'd go with a lighter top: sweater or dress shirt (or both). If you have any other color choice for the flashes, let them match the shirt.
Depending on the formality and if you are wearing a tie, you could let your tie be the focus with color and keep the shirt white or at least a light color that coordinates well with the tie.
If you went with the off-white kilt hose and black flashes, perhaps something in a light colored shirt and/or sweater. Here, a black tie might look good against the lighter shirt.
I'd stay away from the black shirt at all cost!
A white or gray knit sweater would make a nice transition between the black of the kilt and the lighter colors of the shirt (especially if you are not wearing a tie). Since you are in the U.P., I'm assuming it still cool enough for a sweater.
Good luck and post a picture, if possible of your final decision.
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