Questioning the entire premise of the thread is an off-topic discussion now?
It's a rather silly attempt...
I just thought it strange that people are questioning the premise of the thread based on something so unrelated that it's almost funny.
The question is, "are black jerseys a disadvantage?" What does winning the cup have anything to do with that? People are refuting the OP's statements/questions by listing teams that have won cups wearing certain colors. As if the color of your jersey will have a big enough impact to win or lose you a cup. The color of your jersey is definitely more important than how good your team is going into the playoffs.
I'm sorry, but how is that questioning the premise of the thread? That's just going off-road, talking about fun-facts that are sorta-kinda related to the topic. That's like saying one of the reasons the Union won the civil war was because they wore blue. Yeah, they won the war, but did their uniforms really put them over the top to win?
Perhaps having black jerseys does cause a disadvantage. It's not going to be a game-changing disadvantage, so how could it be cup-changing? Jersey color doesn't matter in the grand scheme of things and you all know that, but maybe it does create small disadvantages in any given game. Maybe Quick doesn't see that puck because it's moving through a maze of black jerseys instead of orange jerseys, and maybe the ref blows the whistle too soon during a scrum in front of the Penguins' net and takes a goal away because he lost sight of the puck in a pile of black uniforms.
The topic is about black jerseys causing disadvantages and losing sight of the puck, not teams who have won the cup while wearing black, or red, or whatever color, and I'm sure the OP didn't intend for the discussion to turn that direction anyways.
So yes, I'd say it's off-topic. But that's just my opinion.
(And just for the record, I don't mind discussing what you guys are discussing, but I'd rather talk about the actual topic at hand because it's more interesting and something I'd actually like to read about and get others' thoughts on. I already know what teams have won the cup in recent years.)