VILD WILD swingy chemises. Stick to neutrals (sand, ivory), classics (navy, black/ white) and pastels (baby blue, pink), although a few intense brights (ie, shocking pink) are acceptable. Add gloves, a hat, a structured handbag. Wild pays homage to the groovier side of the Sixties. It aims for hip, not chic,- with cropped tops and belly button-baring bottoms, see-through and cut-out dresses, leggings and bell-bottoms. Head for the hottest neon colors you can find, preferably in clashing color-blocked patterns or Pucci's psychedelic swirls. Think short, think tight. A walk on the Wild side is not for the faint-hearted. Other Messages Of course, your fashion choices aren't limited to looking either like a Jackie clone or a flower child. Sixties mania is the main message this spring but it is not the only one. Using the shift dress as a base, there are ensembles with trench coats or zip-front jackets in vinyl or in neoprene (a surfer-meets-city look). Another popular dress-plus concept teams dresses with cardigans or blaz- ers that are almost as long as the dress. Other concepts are the dress with matching coat and the dress with bolero jacket. Skirt length remains thigh high but, interestingly, the newest short skirts have a flip or a flutter to them. Whether the skirt is bias cut, side- wrapped or pleated, it no longer hugs the derriere as it once did. Moreover, longer skirts — calf and ankle length — are in the offing. TWo of the more innovative American designers, Geof- frey Beene and Isaac Mizrahi, in- cluded longer lengths in their spring shows. The warm earth tones popular in the fall are being replaced by cool sea colors. Medium blues like turquoise and aquamarine are particularly di- rectional, as are yellow-tinged greens. Ice blue and azure blue look best in fabrics with a shine, such as silk shantung or silk organza. But there is a rainbow of options, from lemon and lavender to coral and celadon. White is in a class by itself, a favorite with all the designers and shown in 60 STYLE