Setting the Color of Organic Dye?

I made an organic dye using flowers, but the color changes when i wash using detergent. How do I make the color permanent? The color of the dye originally was light red, but when I wash it in detergent, it turns blue. If I soak it in vinegar, it turns back to the original color again. How do I let the original color stay even when washing? Please help. Thanks

By Marie from Philippines