what breed is this?

[Sylverfly]

Are these buffs, khaki campbell, or something else. The first one is a little darker then the other two I have.

The duck in the front:

The duck right in the middle:

 

[aineheartsyou]

the one with the darker head is a drake. and looks to be buff to me

 

[learycow]

I would say buff as well. I have khaki campbells and they are much darker brown.