I commend both women for pulling on a pair of socks before leaving the house, but I think the woman in the first photo could have done without them. There doesn't quite seem to be rules with this trend; it's basically wear what you think will work. And sometimes it works, sometimes it doesn't.
For those of us who aren't fashion industry people, a safe choice is tone on tone. But if you look at yourself in the mirror, and your socks work well with your outfit, then I'd say you're safe to walk outside!