Quote: FC Callum "A few of them could easily change there home colours.'"
They could, you are right. But the poster was talking about last year's colours.
I'll go through all of them...
Bradford - Usually have majority white shirt, white shorts and socks, but have had black shorts in the past. If that happened, they'd probably have to play in their alternative strip and us in away.
Castleford - Usually play in amber and black so we'd have our away shirt on against them, but sometimes have a white strip, meaning we'd have to wear our home kit.
Catalans - Always had majority white home kit.
Celtic - Always had majority black home kit.
Harlequins - Last year had majority black with the quarters on front. Year before that they had quarters with black trim and white shorts. Could wear anything against them and it wouldn't clash.
Huddersfield - Always had claret and gold home kit.
Hull KR - Usually majority white home kit. Unless they go majority red, we'll be in our home kit.
Leeds - Usually blue and amber, but occasionally white home kit.
Salford - Always had a majority red home kit, but sometimes have white shorts.
St Helens - Always had majority white home kit.
Wakefield - Always had majority white home kit.
Warrington - Home kit seems to vary year on year from white to blue. Could be anything really!
Wigan - Red and white hoops usually with white shorts. If they have red shorts then maybe, otherwise makes sense to use black.
I think the biggest worry is MORE teams going to white rather than the other way around.