Not all offsets turn out as you would expect.
Can you see the offset just below the label in this pot containing agave blue glow? Maybe a close up will help.
I think it is fair to say that's not an agave blue glow. In fact these have been popping up in several pots around the garden. They obviously all sat next to something that self seeded, so could be a sempervivum or an echeveria hybrid.
If any survive the winter, I'll post what they turn into.