A black shift dress is not a neutral. It is a decision. Black reads as intentional and a little bit serious which means the shift dress stops being background and becomes an actual outfit. You can build from it in any direction. Over a white t-shirt. Under a cardigan. With sneakers or with heels or with boots. Black works in every season because it does not compete with anything you layer it with. The shift silhouette in black means you are not trying too hard which is exactly the attitude that makes casual dressing work. The fabric weight matters because black can look flat and cheap if the construction is not there. Quality black shift dresses are the pieces you reach for when you need to look like you actually got dressed.