Yellow also indicates cheapness and a temporary quality. Splashes of yellow are cheery, but a mass of yellow can produce anxiety and cause tempers to flare. Red - makes people unaware of how much time is passing and is widely chosen by casinos and bars for that reason. Red makes food more appealing and inspires people to eat more. They symbolize sturdiness and reliability.
People dislike blue and black when it is related to food items.
Brown - charbroiled steak, chocolate cake, nuts, whole grain bread, etc. are associated with brown. Brown is an excellent color to use in packaging food products. There are very few natural, blue foods. If you are trying to lose weight, use blue plates. Blue acts as a natural appetite suppressant.