I designate my various buckets differently than the Pros at AutoInt, but then I'm working off my personal memory and I'm not about to change to the right way now

But yeah...gotta be able to tell what's what at a glance.
And yeah....I gotta mount some floormat clips one of these days/weeks/years...who am I kidding, at this point I could say "one of these decades"!
ahheck01- I've yet to do the digital-imaging thing, so I can't show a pic of my floor. Look at websites for products like NatureStone to get an idea. I have that sort of floor, with an additional coating of epoxy to "fill the voids" (they normally *want* the voids but that didn't work for me). They sprinkled a friction-media (i.e., sand) on while the last coat of that was drying. Eh, it held up OK, but after a decade of wear (including metal-wheel floorjacks), it could stand redone some time.
Note that the friction media complicates the wipedown a bit. I generally just hose towards the trench-drain and use a pushbroom. A squeegee gets worn down (and hangs up) on the rough texture. I never get it perfectly dry as a general rule; I've done it with the extractor and also my wet/dry vac,but I decided it's usually a waste of time unless I have a real good reason to do it.
I would go gray instead of cream, IMO the latter can just look...discolored. The gray looks more "like it's supposed to be that shade".
Yes, it *will* get permanent stains. Really. NO matter how much you kill yourself trying to keep it pefect. I'm quite certain of this

So think ahead and choose something you'll be happy with *after* all that "it won't happen to me!" stuff does happen. Aw gee, this makes me wish mine had stayed perfect..or at least nicer than it has, but that's life.
I go either way about the "running the color up the walls". I did it at the commercial shop, did *not* do it at my home one, liked 'em both just fine. At my current one, the FRP came in white, the walls were white, so I figured that was a simple call, and it worked out OK. I'd worried about nasty stains/etc., but it hasn't been a problem. Nor have I had problems with that FRP discoloring (even under the fluorescent light), which some people had predicted would happen.