My husband and I always keep in mind all the colors when we shop for produce. Don't forget the darker blue fruits (sorry, George Carlin!) like blueberries and blackberries. Also, in the orange family, mango and guava has many nutrients. In fact, this is a good way to tell if your produce is fresh, by making sure that they are the true color that they are supposed to be. Each color has different vitamin and anti-oxidant qualities.