Green peppers are certainly among the protagonists of the Italian summer, since they make their appearance on vegetable stalls generally during June: among the various colors offered, the green ones are among the most loved for the preparation of fresh salads. But what is this particular color due to? Although at first glance it might seem like a difference in variety, the various colors of the peppers are instead due to the level of maturation reached by them: the green ones are among the least ripe.