Among this season’s favorite silhouettes is a slender column with a flowing, detachable train that evokes visions of the gamine elegance of Audrey Hepburn’s unforgettable “Sabrina” gown. The variations range from an understated strapless sheath gown in lustrous Mikado silk with a detachable train to a glamorous, long-sleeve floral embroidered column with a dramatic taffeta train, cloud-like strapless ball gowns, airy skirts, accented décolleté, trumpet sheaths, and of course — a touch of color in a blush silk corset gown.