Why are so few foods blue?
Blueberries are obviously blue. Some grapes and plums are purple. What other blue foods are there? And why so few? Does it relate to the sorts of compounds that make the blue color and their uses for the plant? Or is it related to what color best enourages or discourages it from being eaten?
When I was studying color psychology, in regards to decorating and creating spaces where people found food more appetizing... blue was a color that would cast a light on foods and make them less appealing. They even recommended putting a blue light in your refrigerator if you were the type that frequented the refrigerator late in the evening for snacking. There are very few blue foods, the only one that I can think of -- would be blue berries, but even blue berries are bordering a blue-purple color.
There are blue potatoes but you don't see them all that often.
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