Could you give us some more information? Like where you got them and if they are bantams? The one with the bluish feet and beak looks like a Silkie, if you count it's toes there should be 5 instead of 4.
Your cute little grey chick looks like a Self Blue Old English Game bantam, which are sometimes less correctly called Lavender Old English Game bantams. Your chick with the chipmunk pattern looks like a Black Breasted Red Old English Game bantam.