This design uses primary colors to deliver its purpose. When I saw this design, I was immediately drawn to its color scheme. I think primary colors make up one of the most powerful color schemes, thus making them a huge tool for me as a designer.
This piece works with shadow art, which I find very interesting. I love pieces with crisp lines and the affect of the nails has exactly that. The contrast between the white wall, dark nails, and light shadows is dramatic, yet simple.