Don Chiofaro has taken his long-running campaign to redevelop the Boston Harbor Garage to . . . the side of the Boston Harbor Garage.

Commuters walking along the Rose Fitzgerald Kennedy Greenway Monday morning were greeted by a vertical blue strip the developer had painted on the side of the unloved garage, to delineate the 30 percent of the massive concrete structure’s footprint that would be gone if he’s allowed to replace it with a tower. The paint job was accompanied by a banner declaring the space “Open to Sea” — the better “to assist passersby in visualizing the magnitude of the new waterfront open space,” as a Chiofaro Co. statement put it.


The installation — or visual stunt, if you’d rather — comes as the environmental group Conservation Law Foundation and residents at the adjacent Harbor Towers condominium complex gear up for a court fight that could block the 600-foot high-rise Chiofaro plans, and as the New England Aquarium continues to spar with him over details of his plan, which it worries could dent attendance.

All the parties say they are eager to see details of what Chiofaro intends to build. Chiofaro has said he aims to file plans with the city later this year.

Until then, there’s a blue strip on the garage to consider.

Tim Logan can be reached at tim.logan@globe.com. Follow him on Twitter at @bytimlogan.