This picture represents calm. the shades of green and the flowy curves are intended to remind the viewer of a garden. "Green is a cool color that symbolizes nature and the natural world". The deeper greens represent foliage, while the paler shades represent the sun bouncing around and lighting up a garden. it attempts to make the viewer think of relaxing on a warm sunny day, among trees, perhaps in a hammock, reading a book; "Researchers have also found that green can improve reading ability"
you can find information on the relaxation properties of green here: