This mat must not be meant to get wet.  We had a bad storm that blew the rain onto our porch.  It got half the mat wet and so that half was darker.  Even when the mat was fully dried the half that got wet, stayed dark.  So then I figured I'd get the other half wet just to make it match and that was a terrible idea.  Halfway through drying I flipped it upside down on the porch in the sun.  I picked it up a few hours later and it had bleed an orangish/brown color onto the concrete and the black dye also speckled our concrete.  We have a brand new house and now our front porch looks like a disaster.  The black speckles make it look like we have mold on the concrete.  Extremely disappointed as I loved the look of this mat.