The day looks delicious on you and drapes beautifully from your shoulder. I don't think black and cafe are close. Yes, they both dark but totally different colours that you would wear with different outfits.
Which style of bag fits your wardrobe and life style better? I have a black RH brief and a black RH day and use them quite differently. The day is a much more casual bag whereas the brief is more dressy and also holds documents and work stuff better than the day.