Knit tights or otk socks, a simple top, blazer, or long jacket/blazer/cardigan. I think black tights are always great, but I think you can liven up the outfit more with dark colored tights, like maybe dark blue or dark green or charcoal. I like the idea of ankle boots (with a heel) with them, a simple top, and a long jacket or blazer or something. I think the mix of materials and colors and things is what makes outfits more interesting instead of just safe and predictable.
I love velvet shorts and have been looking for a good pair!