In a small saucepan, combine the blackberries, sugar, and water. Bring to a boil on high heat, and then reduce to a simmer and let cook for approximately 15-17 minutes. The blackberries will become soft and bright in color and a pinkish purple syrup will form. Making sure it cooks down enough is essential to keeping the ombre effect.
1 cup fresh blackberries, 1 cup granulated sugar, 1 cup water