Delphinidin chloride is a natural anthocyanin pigment responsible for the blue, purple, and red colors in many fruits and flowers. It is widely used as a natural colorant in the food and beverage industry, especially in products where synthetic dyes are avoided. Due to its antioxidant properties, it is incorporated into functional foods and dietary supplements aimed at promoting cardiovascular and cognitive health. It is also studied for its anti-inflammatory and anticancer effects, showing potential in nutraceutical and pharmaceutical applications. In cosmetics, delphinidin chloride is used in formulations for its color properties and skin-protective antioxidant activity. Additionally, it serves as a natural indicator in pH-sensitive smart packaging and sensors due to its color changes under different pH conditions.