I wear similar boots (little shorter, brown) all the time in winter, over leggings and jeans. Also have black leather knee-high boots and black suede wedge booties. (Suede isn't practical in the snow, so these only work spring/fall.) Would love black and brown booties.
The Patagonia Women's Synchilla Lightweight Snap-T Pullover is a classic Patagonia pullover in a midweight fleece for staying warm and cozy on chilly days. The classic Snap-T chest pocket features a nylon flap and the front placket closes with 4 snaps. The spandex bindings at the cuffs and hem dry quickly and prevent drafts from sneaking inside while the nylon trim at the collar provides solid reinforcement.