Oprah Winfrey portrait — featuring the color purple — unveiled at National Portrait Gallery

Oprah Winfrey reacts as she and artist Shawn Michael Warren, right, unveil Warren’s portrait of Winfrey, Wednesday, during a ceremony at the Smithsonian’s National Portrait Gallery in Washington. (AP Photo/Jacquelyn Martin)

WASHINGTON — It seemed only fitting that Oprah Winfrey chose to wear a flowing, full-length purple dress for her portrait unveiled Wednesday at the Smithsonian’s National Portrait Gallery.