I don't usually post the brand names of clothes I find at the thrift store, but I make an exception for sustainable or fair-trade companies and fabrics. This is a Bryn Walker jersey tunic (or dress), made in the U.S.A. from bamboo, organic cotton, and a bit of Spandex.
What colour is it? I'd call it burgundy leaning towards cinnamon. The first photo is probably the closest to the actual colour.
Another view, but this one looks more purple than it really is.
It's the right length for leggings.
But it can also be a dress.
It is nice to have a change from grey!