There are only a few plants in there and they expanded quickly. I think that white and green are overlooked as colors when it comes to gardening. This looks great against the white siding on my house - really jazzes it up. A really inexpensive project if you find something quirky at a garage sale and you know you're going to use that bucket of paint more than once.
Tip: if you're using bricks in your design, try painting the sides of several to make it look like they were pulled from an old building. It will add character to a place where eyes do not normally settle.