. Think KFC, Pizza Hut, and Chick-fil-A. The list is long. Most candies and snacks are also packaged in bold reds for the same reason. 

While red revs up your hunger, yellow brings feel-good vibes and evokes feelings of happiness and comfort. It's also one of the most visible colors from a distance, which is why McDonald's logo can be spotted from almost a mile away. Sure, there's an amazing story behind those iconic Golden Arches, which date back to 1961. However, choosing that sunny yellow may have been driven by science, not just style, because people tend to notice colors before shapes and remember them better. (One of the things many don't know about McDonald's is that more people recognize the Golden Arches than the Christian cross.)