olive green eggs... not as dark as olives, but definitely that color, that's what my mallards lay.
and the cayugas, yep! black as new asphalt, sometimes solid black, somtimes like they'd been rolled in asphalt hash - white with asphalt black about two thirds all over, patchy. they get lighter as the season goes on, but the first couple of weeks, black black.
my rouens lay very slightly pink eggs.
Khakis and Golden 300s, eggshell white, not paper white... just the creamy side of white.
runners, white or palest blue.
I love duck eggs!
festive on the outside, tastly on the inside.