"When you combine red and yellow it’s about speed, quickness. In, eat and out again. "Yellow is also the most visible colour ...

We've seen various brands drop their logo on adverts lately, and McDonald's is the latest to release ... For more on advertising, see the best adverts of all time or the best Guinness adverts.

The McDonald's 'golden arches' emblem is one of the most distinctive logos in the world. It has been used since 1961 - but people are only just learning the psychology behind the iconic colours ...