Leader of the unfortunate lemmings?

So for some reason I convinced everyone in my office that

1. grey and brown can and should be worn together (with discretion, but done right it works)
2. we should all wear a grey/brown combination outfit on Friday

The more I think about it, the less confident I am in my conviction that my coworkers should become fashion forward by the end of the week. What if they do it wrong and end up looking like the reason why people tell you not to wear grey and brown together?

Note to self: only play fashion roulette with your own ensemble