Are there certain colors that keep our appetites in check and help limit how much you consume? Research suggests that the color blue suppresses your appetite because there aren't many naturally-occurring blue-hued foods other than blueberries, gooseberries, eggplant and perhaps bluish-purple potatoes. Long ago when your ancestors were out foraging for sources of food, blue, black and purple signaled that something was poisonous and it's possible that the behavior of avoiding those colors in food are still with you. Research has found that when foods were dyed blue, people found them much less appealing even if the food tasted good. It's even been suggested that you put a blue light in your fridge to discourage you from reaching in for more food.
