Like the title already says, all wool and carpets got their colour in their names, e.g. "Orange Carpet", but not so for white, wool as well as carpet.

Which means if you want to find white wool or carpet via the search in the Creative menu, you won't find it by inserting "white" into it, only by "wool" or "carpet", which is inconsistent to the other wool and carpet colours that can be found by inserting their colour into the searchbox.

Screenshots attached.