New York Fashion Week—Color blocking is too popular a trend to relinquish just yet, but designers are definitely throwning us a curve. Call it Neo Mod. Gone are most of the Mondrian-like lines and right angles; here, rounded corners and bold graphic strokes are the stars. Diane Von Furstenberg (center), captured two trends in one: a half-moon handbag with curved color blocks. It’s a bit groovy, but sophisticated. And never psychedelic.