I think these days the NRL won't allow anything that even remotely might be a clash. Round 2, Penrith were denied the chance to wear their then away teal jersey against Parramatta's home blue, so were forced to unveil the white jersey earlier than hoped. Also, apparently the same teal jersey was considered a clash against Brisbane's home maroon. So, it seems that this weekend it will be Manly maroon and Warriors white,as maroon and black may be considered both darkish colours, and therefore clash. Unless Manly's choice is the white away jersey, or the Warriors wear the heritage again.