The palette
Water is the subject here, and it takes nearly half the sheet: river, branches and basin share one ink. Choose it deep and calm, so that the piers along the branches read in negative and the square end of the Inner Harbor stays sharp. Green has two masses only, one in each upper corner, Druid Hill Park and Patterson Park, plus the small patches of the neighbourhoods; a quiet green is enough. The tilt of the north-western grid needs no colour at all: the streets carry it.