While reading through I was hoping they'd reference a study I've seen mentioned a few times on various sites. It serves as a very effective example of how colour influences our perception of food.

Source.

During one experiment in the early 70s people were served an oddly tinted meal of steak and French fries that appeared normal beneath coloured lights. Everyone thought the meal tasted fine until the lighting was changed. Once it became apparent that the steak was actually blue and the fries were green, some people became ill.