A closer photo would help. She looks partridge, maybe blue partridge. You should post this on the silkie thread where all the experts hang out! Pretty birds!
It's been awhile since I've raised Silkies (just got four of 'em at our last swap) but I think I've heard that color pattern described as "blue birchen." Birchen coloring is black but for a silvery head and chest (not the best description here), and your silky looks kind of like that, only blue instead of black. Just a thought. She is gorgeous, whatever the color!