This page is about the benefits of the morning cereal. Green are the dominant colors here, and as green is composed of blue and yellow, everything else fits. The background is a perfect complement.
This is an example of how a stock photo can help to illustrate an article. The guy eating cereal is a common photo, but the background integrates the cereal plate, the guy the info and the other photo. The whole result is light, fun and easy to digest, as the cereal…