Looks like you might have some dominant white genetics going on some where. Perhaps your white hen? This often gives pink skin and in many cases will darken as the chick gets older.
I know next to nothing about breeding genetics.... I really really want a partridge coloring. I had a partridge rooster who was gorgeous but he was sadly killed by a predator last year. Can you mix two colors and end up with partridge? Or is this coloring only introduced through a non-Silkie breed?