Pants can choose dark colors: black, dark green, dark brown, and light colors: beige, khaki and pink are all good.
Shoes can be freely chosen, but what can be controlled is: the same color as sweaters or purple.
Not recommended: sweaters, trousers and shoes of the same color (especially dark ones, all black and purple, too dignified and old-fashioned); Too much color contrast is not recommended. If purple and yellow, red and grass green match, it is too picky. Try to avoid them.
_ Have a nice winter!