We had our first PC in 1987 (an XT clone) and it came with a single 5.25" floppy drive (we added a second one later to be able to copy disks). Back then the 3.5" floppies were only a thing I would see at friends houses when I'd go to play on their Atari ST machines. All my PC games were in 5.25" floppies, this was the common standard in game shops - some games would include both formats in the box but this was not a common occurence. (there was often a coupon that you had to return with a payment to get the 3.5" floppies if you needed them).
I have several 5.25" floppy drives, but I've been looking to get one with a grey bezel for a while now. From my own experience and also from looking at adverts in old computing magazines, it seems grey/brown floppy drives were the norm in the late '80s / early '90s. Before that in the mid '80s, 5.25" foppy drives were often black (think IBM PC) and after that in the mid '90s it seems OEM were increasingly switching to beige drives to match the color of the case.
Here's an illustration of the grey drives / beige case look: