You've probably seen this effect used in print ads and TV a dozen times. It's designed to look like someone has torn a classified ad out of the newspaper and highlighted the important points. The effect is easy to pull off—the only thing that takes any time is creating the fake classified ad (but I give you a sample one to download, in case you don't feel like doing it yourself).
Quick Tip: Lightening color while saving saturation
If you're working in the Color Picker and want to choose a lighter version of the currently selected color without lowering its saturation, click on the “S” button in the H, S, B fields area. This brings up a version of the Color Picker that lets you choose a lighter, or totally different, color ...