Any great gardener will plant en masse and with a broad brush stroke to achieve a dramatic effect in his garden. The same is true for your home. Here is a great example.
These vases are new but echo the antique “Blue Opaline.” Cerulean blue is also appropriate as a color description. You could have a neutral environment and plug this collection in to get a great burst of color in any room. I could easily picture this in a front foyer on a side or center table.