It looks like it is a light phase, so 1lpoock could be right. Some light phase ducks hatch out in a darker shade with less white (some harlequin phase do too). With some of them, it even gives them a golden sort of shade overall. I have one that hatched in some Appleyards that looks almost identical to yours.
Her father is a silver call and her mother is a white mallard. Very interesting ...... do you have any pics of your duck? Also does that mean this is a colour that she will reproduce, and what would the drakes of this phase look like assuming you can get them.
Yes, you should be able to get drakes that color (or breed her back to her father). I imagine that her mother was carrying light phase and her father was a silver that was genetically m+/m+ or m^d/m+ rather than m^d/m^d. In the US, we have the same situation with Silvers (Snowys). The eye stripes make me think dusky is *not* involved, just light phase. I would really breed her back to her father. That would by far be the easiest thing to do.