Case-Mate prints the case just as it is uploaded by you. Make sure the case design is just how you want it before clicking on buy now!
Here's a tip: When desiging your case, on all the layouts except the grid, make sure your image fills the entire template - not just the back of the case. The area outside the case itself - up to the grey dotted lines, represents the edges/sides of the case (what we call the wrap). Place the image just how you want it to look on the case but make sure the entire template is full. If the image does not extend all the way to the edges (dotted lines) this area will print white or will be the color of the background you have selected.