These are the darker charcoal gray

https://www.amazon.com/Crocs-Unisex-Classic-Black-Women/dp/B007B9MFJC?th=1&psc=1

The lighter gray is mostly on secondary sale sites

https://www.kickscrew.com/products/crocs-11016-07w

https://www.ebay.com/itm/325675898465