The palette
This is a sheet where green does as much work as water. The Mall, the President’s Park, Potomac Park and Rock Creek Park all take the same tint, and the triangle at the centre only reads if that tint holds its own against the streets: give it real presence, without letting it rival the two rivers. The water, one ink for the Potomac, the Anacostia, the Tidal Basin and the Reflecting Pool, can go deep. The diagonals need no colour of their own: they take the ink of their rank like every avenue, and their direction does the rest.