I learned this years ago in a graphic design seminar given by the Editors’ Association of Canada (then the Freelance Editors’ Association).
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.