Some of the colors are supposed to be lilac gray. I saw a blue gray, too. Lol...the saying "Old Blue Haired Lady". I haven't seen one pic where I thought it complemented their skin color or enhanced their appearance. I don't like what I've seen.
I think I've heard it termed 'Granny-Chic' and it worst case scenario's it can come along with fuddy duddy cardigans and sickly flowered dresses. Of the above pictures I would say only the last one looks any good- I suppose Grey is still a viable hair colour at the end of the day....