I'm not on the beige train, but glossy black plastic with a small amount of blue backlighting is my preferred aesthetic. I hate rgb, it's gaudy and distracting to me, and any peripherals I get that have it I usually shut it off.

However, one circumstance I did have it on was when Battlefield 1 came out, and I discovered my G610 keyboard would automatically shut off all key lights except for the key bound for the gas mask (which would light up bright green) whenever you took poison gas damage. Very useful feature and I was pretty impressed that somebody came up with that.