I picked up a Borrelli cashmere sweater yesterday; it is a fairly close fitting crewneck cashmere sweater (light-medium weight plain weave). It isn't in my favorite color -- sort of a bright lime green -- but I got it for $42, so I couldn't pass it up (the Borrelli label had been removed from the sweater, so it made it to triple markdown at FB; I knew it was Borrelli though because of the size tag, cut, etc.). My question is, how do I wear this? I was thinking it would go fine with anything dark -- jeans, grey flannels, etc. Should I wear a button down underneath? If so, should it be dark or light in color? A sky blue button down looks fine underneath it, but I'm worrying about it being too preppy of a look. On another note, is it pathetic that I need advice/permission from this Forum on how to wear a freaking sweater?