Purple foods (like berries or grapes) contain flavonoids, powerful anti oxidants, which fight off disease.
Green foods (such as watercress, broccoli or spinach) are a rich source of magnesium, vital for nerve and muscle function.
Orange foods (carrots, cantaloupe melon or butternut squash) are full of beta-carotene needed for healthy skin, vision and immune function.
Red foods (tomatoes, watermelon) are rich in lucopene, an important anti oxidant needed to fight
Pink foods (raspberries, strawberries or beet root) contain anthocyanins, which help control blood pressure and fight bacterial infections.
info from: Jennifer Irvine