Any idea what species this could be?

our duckling just hatched and i really have no idea what it could be; its mostly black, with a tiny white strip under its neck and under its beak, its beak is mostly black with a few pink spots, and a silver chest. its only a couple days old and ive never seen a silver coloring before. the parents could either be an american black duck (were not really sure what she is, we bought khaki campbell eggs and she hatched out and looks just like the american black duck), an ancona, or our weird mixed breed duck whos part ancona part something else, shes all black with a few white spots on her head and chest. the father could be a khaki campbell, a mallard khaki cross, a mallard, an ancona or another odd mix who were not sure of. i would like to upload pictures of them all, but im not sure how