Yellow shoulder pads (both left and right) - can be ink or any other type of yellow.
Shadow grey trim.
At the moment I have already undercoated in chaos black, second spray coat of Shadow Grey (worked really well), then I had to put two layers of white on the pads and then I put yellow ink (this actually worked really well - I like the way that yellow ink makes it look really shiny).
I guess that I will just learn from my mistake and put the shoulder pads on later on, undercoating in white from the start. Unfortunately I have already undercoated with the pieces glued on the next unit (Grey hunters) although I will be having Blood red shoulder pads for them so that is not so bad (I think that red will go over shadow grey much easier than yellow).
All hints are welcome for the future advancement of the Space Wolves Chapter's existance :w