I have 6 eggs due to hatch on Tuesday, July 14th so I am hatching silkies too!! Mine will be mixed colours, mom is grey partidge, dad is a dark buff! I should get colours across the board!
Your chicks can come out a variety of different colours! Buff is a very dominant colour, so I would expect buff or buff mixed with other colours. All you can do now I just wait and see!
I have about 12 silkie eggs in the incubator. The parents are grey partidge and a black hen, breed to a dark buff roaster. I have been getting chicks that go from pure white to solid black. Go figure! It is like a true surprise every time!