Yep... I screwed up. At the very least, I've created a lot of extra work to correct this, but I still don't have a solution. I have a flat-stone pathway that is somewhat pitched away from the house. It's been there for the past 15+ years and soil and small stones we've packed between the larger stones have eroded leaving some rather deep gaps. Other areas have sprouted weeds. Admittedly, there is not a good foundation base, although I did attempt packing in some stone dust and crush at one time. I've also tried Gator Dust polymeric sand. This last attempt was to use concrete. Unfortunately, the dark gray concrete dried to a much much lighter gray. It looks horrible and I'm about to chip it all out. I've even considered staining it, but that could potentially make it look worse. Does anyone have any ideas? (We are about to put our house on the market, and I gotta fix this.) Thanks.