Opposite page: Black and- white is a fresh combination for spring evenings, especially in a cocktail dress by Bill Blass Evening, one of several new affordable, designer-name lines. The taffeta dress mixes two bold patterns, ginghams and plaid. Crystals on the slightly raised waistline add sparkle. John's double-breasted navy pinstripe suit goes from the boardroom to bar. He wears a wool suit from Jos. A. Bank Clothiers, a white Nino Cerruti shirt and a colorful Nicole Miller tie available at Kosins. This page: Nautical tacks in a new direction. Add a splash of gold instead of red. Use a star insignia instead of an anchor. Keegin's pantsuit is in cool cotton pique. The navy double-breasted jacket is trimmed with white and gold buttons and a gold star. Gold stars edge the pockets of the pants. The outfit is from Sally's Design and Boutique. Accessories are a gold rope belt and a nautical-motif Adrienne Vittadini scarf. - SPRING '92 51