Re-Coloring Existing Grout

Before & After Photos of a Bathroom Floor 
The grout in this floor was was so dirty and cleaning didn't help to brighten it up.
We cleaned the floor, let it dry overnight and then colored the existing grout with Antique White. 
Caulking was also done around the room.
Notice the toilet - it was installed on 'shims' that protrude over the tile... there was no way to fix it without removing the toilet and the homeowner didn't want us to do that.