On Carol Sulcoski’s open-front cardigan, fizzy lavender stitches, knit in “Zara Chine” from Filatura di Crosa/Tahki Stacy Charles, seem suspended in midair on a background of charcoal “Zara.” Two-color fisherman’s rib creates the effect; broken rib forms the set-in sleeves. A reverse three-needle bind-off fashions decorative shoulder seams.