I just got my sandstone work today. Apparently, I snatched up the last one at my local store. Anyhow, the color is slightly different than I'd anticipated. It's actually quite grey with a hit of warmth.
In the daytime, I can see more of the sandstone color other members have posted. At night, it certainly looks like a true grey!
I'm happy with my choice, and pleasantly surprised with the actual color. I suppose everyone's sandstone is slightly different. I like mine. I would recommend sandstone to anyone looking for a neutral colored bag! Good luck!