My walks around the city are a study in black in white. The white is from the buildings, their facades of marble, limestone and granite.

The black is from the coats. Long, short, open, closed. But black, almost always black. The puffy parkas of the seriously cold. The long topcoats of the multitasking and self-important (a lot of those around here). The dark suit jackets of those impervious to the chill.

Put them all together — the Hill types striding across the Capitol plaza; the office-worker at lunch — and you have a ballet, a choreography, a study in contrasts.

D.C. gets color from its tourists. But it gets its subtlety and its heft and its monochromatic harmony from its denizens.