A brown shoulder layer with a pale dress stands clearly apart from the lower area in this side view. The shorter upper surface has several horizontal darker and lighter zones. A long pale skirt with side folds remains visible beneath. Hands extend towards an antlered animal in front. Neither that setting nor the surface texture establishes fibre, origin or actual use of the outfit. Assess the visible colour contrast separately from those unknown details.
Use the reference specifically for colour. Should the shoulder piece remain a distinct darker area or would you prefer a closer pale variation? Compare actual pieces over the same dress before changing edge or texture, keeping contrast readable as its own question. Another shade need not mean abandoning the shorter shape too.
Check the shorter form from front and back on your own outfit afterwards. The side view cannot explain the complete connection. Add the actual bouquet and rest hands normally instead of recreating the scene. Choose how much upper dress should remain visible. The styling idea concerns contrast and extent rather than an invented material history.