Which came first, the cardinal sin or the cardinal rule? Either way, a vivid cardinal red was the exclusive color of Comme des Garçons’s powerful, unrepentant spring collection. Although Rei Kawakubo doesn’t typically delve into hot-button geopolitical issues, it was hard not to read between the rose motifs and blood splatters a visceral sense that all is not right in the world. Even if that wasn’t Kawakubo’s thought process, that a single shade — applied to materials as diverse as leather and chiffon, and shapes as diverse as a cage skirt, a big red riding hood, and piles of patent-red belts — could carry an entire collection is thought-provoking enough.