This one takes some explaining - This photo is taken at Meijer Garden, in the children's garden. This is a series of fountains and pools in the shape of the Great Lakes - the garden provides boats (you can see one at the very top) that will go all the way from "Lake Superior" to "Lake Ontario". The blue squiggles inside the state outline are the major rivers in Michigan.
My son has a t-shirt that says "Michigan: America's High Five". In this photo you can see the "mitten" outline of the lower penninsula.
This says "BLUE" to me, because in Michigan, you are never more than 6 miles from a natural body of water.