Hi A friend of mine did this to encourage healthy eating with her toddlers and herself as they were big finger food kid. She lost a few pounds but better then that she created a really good habit for the kids they were here one night for dinner and the little one was telling me how he would need a red food for bedtime snack as he had not had any red today.
I don't know if I remember them all but I believe it was white (onions, garlic, leeks, tea,milk)green (broccoli, kale, spinach) red (apples, peppers, tomatoes, wine) black (coffee, chocolate) orange(papayas, oranges, carrots) yellow (peppers, corn,peaches). Thats about all I can share but it sure can't be unhealthy to eat by color unless that color is pink cotton candy or my nemesis right now red cinnamon hearts.