Colour theory as a study is fascinating. We are surrounded by colour, and it can have a tremendous impact on our mood, behaviour, the choices we make, and how we perceive the world.
Marketing firms have been using colour theory for decades to influence what we buy, how much we eat, and how long we stay in a restaurant. For instance, orange, yellow, and red are known to make us feel hungry and many fast food restaurants have capitalized on that with their logos and interior decorating.