Blue wool can be used to make blue carpets, blue beds and blue banners. You just need two things Sheep Wool and Lapis Lazuli to make a Blue Wool. Please follow the following steps to make a Blue Wool.
In order to make blue wool, the basic item that you will have to get is wool, so find sheep and get at least one piece of wool out of them. But don’t kill them, just use shears to get wool.
After that you will have to find lapis lazuli gemstone. You need to find and get at least one lapis lazuli stone. Use your iron pickaxe to obtain it.
Now you need to use the crafting table to craft a blue wool. Go towards crafting table and open up 3*3 crafting grid to add a sheep wool and lapis lazuli stone in any two cells of any row of the grid. You will get a Blue wool in the right-side box of the crafting table. Add this Blue Wool into your “ready to use” stock.