It's not always easy to choose attractive, coordinating colours for an expensive graphics project. Directors of a prosperous company publishing their annual report want their report to be give an impression of quality and perfection. One of the ways to do that through colour is to choose a combination from nature or art. Take a beautiful image from nature and pick three or four colours from it.
Or take a harmonious painting and borrow its colours.
The result should be professional and pleasing.