Hmm... I don't understand your pictures at all. I don't see a Saxony drake in any of your pictures and several of them do not look like the genders labeled. Okay, I just went back and looked again. I see what I am assuming you are calling a Saxony. That is definitely not a pure Saxony if I am looking at the right bird. He is a mix, but clearly has at least one Blue Dilution gene so one of his parents could have very possibly been a Saxony. He would pass that Blue on to half of his offspring. Fawn and White carries double Blue dilution, so every offspring from a Fawn and White would have at least one Blue dilution gene. The Blue of the Blue Swedish is simply black combined with one Blue dilution gene.
There are several possible combinations that could give the color of the bird in question (and also the drake that looks similar to a Saxony), but I am still confused by what you are calling drakes and hens in the pictures. Anyway, several of the colors in question carry Blue dilution, so it could have come from multiple birds. I am guessing for multiple reasons though that it is your Fawn and White hen x the drake you are calling Saxony color.