Did you seal it? With what?

Bump!

Do you have to use non-white bath mats or rugs? I'm in the middle of a bath remodel and just sealed the grout in my shower and will do the same in a few days to my floor which just went in yesterday. I would test your sealer on a sample tile to see what happens. I'm using 511 Impregnator and if it didn't change the color (darken) my grout, which I'm sure is more absorbent initially than your marble, I'm not sure how it would discolor it. But you have to test it. BTW, the 511 Impregnator was recommended by my tile guys and it ain't cheap ($34 for a quart). I don't know why you wouldn't seal the grout on your floor which will get wet and have dirt ground into it.

Thanks! I was worried about discoloration from sealing (and have read various articles about sealing v. not sealing) but will probably test and then seal. I don't need a non-white mat/rug but I really like the idea of the contrast! Thanks to all for the advice.

Was this ever answered? Marble is sealed, but I'm nervous and I too would like to use a darker mat on our light marble floors.

Buy a good/high quality mat through a larger retailer (PB, RH, Bloomingdales, Macy's, etc) who will stand behind their product. Color fastness should be easy to test. Dampen the bath mat and place it over an old white towel/sheet and you should be able to see if there is any color transfer.