Maybe concrete stain?


onquest wrote:
Last month we put down ceramic tile in our kitchen. The grout is a
medium
gray color and looks pretty good. However, when we mop the floor the
wet
grout turns a darker gray and looks great!

It sounds trivial, but the color difference is really astounding - it
makes
the entire room look better

Is there any way to permanently darken the grout?

Thanks for any suggestions.