Hi belovaldi, your atlantique looks nothing like the picture on the Balenciaga website. Somehow on the web, it looks way lighter than yours. My mother in law is in Paris and I can't decided whether to get anthracite or atlantique...
This photo from matches.com looks very close to irl, imo. Hth

matchesfashion.com/pws/images/catalogue/products/bal-b-115748-d94jt-2_blu/xlarge/bal-b-115748-d94jt-2_blu_1.jpg