Do I have this right? A dark brown is usually black, a light brown is usually chocolate, and black is blue? I hatched two ducklings, both of which had a white mother and a father of unknown color. It could have been a chocolate, black or blue, form what I know. One duckling, which was a runt and passed away at only a day old, was yellow with a light grey-blue, and the other, still living, is black and white. About two months ago I hatched another muscovy, who is a black. He was a dark brown with a yellow bib. So what is this black and yellow duckling?