A blood orange is a type of citrus fruit that has a deep red or purple flesh and a slightly sweeter taste than regular oranges. The color of the flesh comes from the presence of anthocyanins, which are natural pigments that are often found in other red and purple fruits and vegetables. Blood oranges can be eaten fresh, used in salads or desserts, or juiced for a colorful and flavorful addition to cocktails. They are typically in season from December to May.