I'm guessing if you poll the team - they love the addition of Armour Gray. I've mentioned a few times before Purple and White as a color combination often have a complementary color - Silver, Black, Gold are the common ones.
Examples; Washington Huskies, TCU Horned Frogs, Northwestern, K-State, ECU, Western Carolina to name a few.
Purple and White is perfectly fine and IMO a classic combo that should forever be Furman's go-to combination. But there is history here. I'd have to ask Dennis Zeiger - I believe he visits this forum to jump in here, The first Diamond F helmet was a silver helmet, not a white helmet, also early on I think silver britches were worn, as well as Furman had a silver prominent stripe on the pants and helmet.
I like how Furman Football positioned the Gray as Armour Gray and with the current uni design - we now have a crisp, military-inspired look. I think the poster looks great, it's building a brand that's gritty, and I bet for high schoolers relevancy.
* I'll also take a hit on the black - had no problem with that too = a bit of honesty it was a trend folly - and grew tired quickly. I don't think GRAY will do the same. Part of the problem with that batch of black era unis - they looked dated right after they came out. IMO a poor Nike design.