I would say your two lighter colored non. Bearded silkies are definetlty males . the darker one as well might be roo as well possibly just because It's crest /" top hat poof"
is slicking back instead of being rounded like a female and they all look roo with their upright stance in these pics . And their combs are prominent as well like male Roos have and being reddish in color . I would ask to see the darker colored ones waddle if any at all including the comb on top above the beak a better front pic of him or her but just by the ones you have posted they look like you have 3 boys on your hands !