Get yourself ready for iOS 7 and install this little gem. All the app does it takes an existing picture and adds iOS 7 style blur. I thought it was gimmicky at first, but truly (as someone who has been using iOS 7 for a while now) it is needed for the home screen background.
The lighter font weight on the app names makes busy backgrounds distracting, but solid colors are boring. With Blur I have created some great little background images.