Anyone missing a grey cat?

There has been a lovely grey cat around our house lately, solid in color with a purple collar on. I was just wondering if it is missed by anyone (near Highland Ave. and Hampton St.). It is not a problem, just checking. It does want to come in but is scared. Haha, it resembles our two in and out cats, and actually came in one time by mistake! Haven't seen it before the last few weeks. Just checking if it is lost or just wanting to stop in for dinner? 412-609-0575