Moody Blues

Using subdued, antique blues gives a room a sense of tranquility and composure, but it also promises some excitement. Unlike most blues, these colors don't try as hard to please. They harbor secrets and mystery, evoking overcast days, deep waters and uncharted territories.

These pix are from House Beautiful slideshow on decorating with moody blues. It doesn't take much -- silky drapes, a wash of paint -- to do the trick in an otherwise neutral space.