This is a needle in the haystack request, but thought I'd give it a go since I've ordered more than half a dozen samples without success in matching the color on the right panel wall! Previous owners painted half living room this soft green-gray color, and the other half Sandstone Cliff. I want to make the color all uniform with the mystery color so I don't have to repaint cathedral ceilings. Any ideas what Behr color this might be (ballpark it)? I'm willing to get another 1-2 dozen colors to try to find the match.

I already tried custom color match, but it was off. The wall on the right is mystery green, the wall on the right is Sandstone Cliff. The colors on there are Silver Ash, Eon, Seagull Gray and the darkest one is Dolphin Fin I think.