Collingwood have a home jumper and an away jumper:
Home:
Away:
The away jumper is clearly a clash strip, I mean it has stripes and the home jumper has, um . . . stripes.
As for the notion they have never changed their jumper and therefore it is sacrosanct, bollocks: the black on the sides now bleeds onto the front, only since 2011, look here for all the differences over the years:
https://www.footyjumpers.com/collingwoodall.htm
If there really is a clash with some teams (North Melbourne maybe??, Geelong is stretching it) then they need a genuine clash jumper not this crap.
DS