Thank you for the responses. I know NOTHING about ducks. I'm a chicken girl myself which the owner of my local feed store knows. Knowing that I have chickens that lay green/blue eggs (which is still something of an oddity here in Canada apparently), he mentioned that he had a lady in looking for ducks that laid green eggs. His duck supplier said "no such thing". So I told him I'd check with the folks on here. I'll make sure to pass the information on to her and him.
I just made a page on Swedish ducks and from the information that I researched it said they lay mostly white but may also lay a blue or gray tinted egg.