There is always serious outdoor cold weather gear, like
https://www.yahoo.com/lifestyle/beat-the-freeze-these-fleece-lined-leggings-are-amazingly-flattering-and-as-low-as-24-right-now-170456015.htmlI can't speak from experience about tights per se. But like almost any outdoor enthusiast who has skied, I've used winter underwear underneath other clothing, and I've also worn full fleece pants and jackets. They can be very effective in cold weather conditions, especially under a wind break layer.
You can find lots of similar stuff in any outdoor equipment supplier. E.g., search Rei and Campmor for
leggings
or
cold weather pants
or
tights
But I wonder outdoor wear is thicker, and would show off your figure less.
There are also thermal underwear bottoms - I wonder if they look much different than tights.
For that matter, there are full on winter fleece pants, that might be too warm for indoor rinks - though outdoors, in the wind, they sometimes need to be worn under a windbreak layer.
But beige...?
If you Google
beige winter tights
you will find lots of them, many different brands.
There are also bodysuits, which cover top and bottom.
Fleece goes in washers and driers just fine (warm wash, tumble dry warm). But many other outdoor performance fabrics should be treated gently, possibly cold water wash, gentle cycle, and tumble dry with little or no heat (or hang dry), all while in a mesh bag to cut abrasion. I'm not sure how that compares to tights.