I think the camera still made them look a little bit darker than in person. Not sure who their parents are so I've been trying to work backwards to guess from the color genetics possibilities.
At first I thought they definitely could not be chocolate because their brown is so dark, but then I came across this picture labeled as chocolate in this article about sex-linked colors that looks quite dark too, so now I'm not sure.
Is brown or chocolate different when it's in the mallard pattern?