Jane's pink gown seen while attending the opening ball where she first sees Mr. Bingley. It's a beautiful pink, pale pink dress, in the usual sort of "wrap" style with short sleeves and what appears to be a tie in the back. It actually look like it ties and isn't just for decoration like some of Lizzy's dresses are.
You can seen the little ribbons at the arm where it may be A look at the "wrap" style like most of her dresses
tied together or possible a faux bow
Notice the tie in the back here as well as the shoulder treatments
Again, the wrap as well as the indentation of the corset and the little
bows at the sleeves.