What age are these birds? They look young, can you see a bib under either ones chin? and red feathers anywhere on the bird but especially around the vent area or belly? If so males.
It looks to me that these birds are about 4-6 weeks old and if so the colors can still change a bit during feather growth and fill in. it looks like in the photos that the heads are not completely feathered yet so i would not wager a guess on color or sex as of yet. try again in a week or two.