What color silkies do I have?

[Amandahein]

I got 3 silkies and I'm testing 5o figure out what colors they are. The first two pictures are the same chick. Looks black with some partridge stripes. Mayne a cross between the two? I also read black with partridge leaking is a sign of a rooster. Anyone know if that's true? The 3rd picture is chick number two, I'm thinking blue but correct me if I'm wrong and the last picture is obviously white.

 

[Shadow Source]

The top, and the next one down look like a splash, the third one looks like a Silkie, the last one looks like a White Silkie, Beautiful birds!!