I don't think the blue/silver looks too masculine; but then again, my mtb is basically all silver and not girly at all (it's a unisex frame in an XS size). I like the green/silver one the best, tho. Not fond of the lavender either. But like Knotted said, go with what YOU like. You want a bike that will make you smile. I recently took back a pink cruiser bike I bought, and a large part of it was that the color was just too flashy and girly for me. I bought a blue one instead, and it made all the difference in the world to me. It may seem silly, but color does matter!