Advertising and Marketing is known to make good use of colour psychology. Using colour strategically and consistently enough is a clever way for consumers and customers to relate and associate good connotations to that particular business/brand.
For example, the McDonalds logo is a cheery, fun yellow that catches attention. Just a few years ago it was teamed with red in all restaurants, it created connotations of hunger and quickness, the perfect collaboration of colours for Fast Food with a happy, fun and friendly environment for not only children, but all the family.
Since 2010, McDonalds opted for a more organic and natural approach with the use of green and brown across their restaurants, making the food appear less unhealthy and more organic whilst giving the atmosphere a more comfortable and environmentally friendly feel, making customers feel relaxed and not so rushed as the previous Fast Food colours conveyed.
Colour Psychology looks at how colours have an impact on people both mentally and emotionally. There are some arguable elements to colour psychology and there are some that are more accepted and proven. However, it is good to keep in mind that there will be a minority of various interpretations and perceptions between different cultures, genders, ages etc.