Looks like Wind Azul dyed stone pavers?
Still, very difficult to say for sure without a Hue ID. When you cursor over them, they should say what they are - "paver" or "carpet" or "cloth", etc.
You can get the Hue ID either by using a House Decorator Tool or by using the Menu Action button "Hue ID" in the EC client.
Once you have the Hue ID, you can search the
Stratics Wiki Hue List for the color. (For the record, Wind Azul is Hue ID 2741.)