They don't look like mixes to me. The blue hen is prob a blue Andalusian, the rooster look like a cochin, not sure what kind, but I've seen it before. The two in the first pic look like cream Brabanters.
Thnaks I tired to go back and edit on the pix but wasn't able to anyways I was wondering what the little blue hen is?And your right they are cream brabanters and the bantam cochin roo with them.
Has the blue pullet got colour in her hackle? The photos make it look as if she has. Also her lacing does not look good enough to be a proper blue Andalusian.