I would choose colour combination 7.
Close to the riverbank the river would be like it usual, so everybody from the region will recognize their river.
In addition the deeper water in blue, so your „two face“ vessel would more visible and would direct more the view to the „action-area“ with bridge moving and vessel.....
Close to the riverbank the river would be like it usual, so everybody from the region will recognize their river.
In addition the deeper water in blue, so your „two face“ vessel would more visible and would direct more the view to the „action-area“ with bridge moving and vessel.....