血橙, or "blood orange," is a type of orange known for its distinctive dark red or maroon flesh. This unique coloration is due to the presence of anthocyanins, which are pigments that develop in the fruit when temperatures are cooler during the growing season. Blood oranges are typically smaller than regular oranges and have a sweet, slightly tart flavor. These oranges are primarily grown in regions with a Mediterranean climate, such as Italy and Spain. They are often enjoyed fresh, juiced, or used in various culinary dishes. Blood oranges are also rich in vitamins and antioxidants, making them a healthy addition to any diet.