Right now they do look like Silkies, but you'll need to see how they feather in. If their feathers are normal then they are Silkie mixes. If the feathers are Silkied.. well you get the idea. The dark skin, crest, an extra toe are dominant traits.
I have a couple of new pics but they arn't very good I'll post them though. They seem to be getting fluffier and fluffier
Here is the little black one that hatched from the bluey coloured egg.
and this is one of the other blue and buff coloured chicks.(they blend in with the leaves)
Sorry about the photos, they are quick little buggers and never seem to be standing still.