Dutch Boy's Stonewall Jackson is a similar blue-toned gray.

Another similar color is Behr Greenwich Village.

I just painted my main floor a colour that turned out somewhat similar. When I had sample paint made and used it on primed drywall, it had a light green undertone, but in the space as is there's more blue to it. I think it'll turn out when balanced with the other parts of the room. During the day, it's light grey with blue and in the evening, compared to the blur accent wall it turns more grey. It's called Silver Quill from Behr and the darker blue accent is Behr's Teton Blue. Might be helpful to someone looking for something similar. Cheers!