This spring, designers are seeing spots -- and flowers, paisleys, polka dots, and zigzags. Women are taking the look to work in prim printed skirts and blouses, and out on the town with dramatic dresses. Just don't go plain. Missoni dress, $995 at Gretta Luxe, 94 Central Street, Wellesley, 781-237-7010, and Copley Place, Boston. Marc by Marc Jacobs shoes, $375 at Marc by Marc Jacobs, 81 Newbury Street, Boston, 617-425-0404.