Darkening grout/tile on tumbled marble backsplash (pre-grout sealant used)

[NovicesRus]

Hello all:
I wish I read this site before our tile job - incredible info on here!
I have read many, many posts, but am still uncertain as to how to proceed.

Here's my problem:
Yesterday we sealed our tumbled marble backsplash 2x with penetrating sealer prior to grouting. We loved the color of the tile. Today, our contractor came back and applied the grout and when we got home tonight, the grout and tile now looks too light. We haven't touched it so far.

Do we:
-use a vinegar wash to remove any potential haze? if so, how long do we wait before doing this? is it safe?
-scrub it with warm water and rough sponge?
-apply a colour enhancing sealer on top?
-attempt to remove the original sealer (used pre-grout) and re-seal with a colour enhancing sealer (not sure if this will even work given there is grout ontop of the tile now)? Again, if so, how long should we wait?
-???

Thanks in advance to anyone who offers advice.
Jamie & Tracy

[Davestone]

Don't panic, try rubbing your hand acroos the face of the tile to see if there is a haze, if so a scrubby pad and water should remove most of it.A grout brush used on the grout may also remove it there to reveal a better color, if not,don't be surprised,grout frequently dries too light, and people don't like it, always go a shade darker when picking it out.Wait a day or so before doing any of this to let the grout harden and get it's color.If you still want to enhance it you will need to wait whatever time the enhancer recommends, then you may have to strip the sealer out of the stone,again use whatever the sealer manuf. recommends, and let dry before enahncing.