Berries with a dark purple color include acai berries and purple chokeberries. Boysenberries, Indian plums, huckleberries and elderberries are other berries with a dark purple color.
Acai berries are small, round, dark purple berries that grow to 1 inch in diameter. Acai berries grow on acai palm trees in South American swamps and floodplains. As acai berries are highly perishable, they're often ground into pulp soon after they are picked.
Elderberries are round purple berries that grow in clusters. They are most commonly used in pies, jams and syrups. Boysenberries are large berries produced by combining blackberries and raspberries. They are in season during late spring and early summer.