Blue turn-ins vary significantly more often than Reds do. When I did them as an example, Titanium Alembic, was on special turn-in. I made several of them but could not turn them all in before the window ended. I held on to the others "until the next time". I held those Alembics for 4 weeks and never once did Titanium Alembic return as Blue script turn-in. Eventually, I had to just let them hit the floor.

More generally speaking though, Blues are going to be about level 56-58 mats; Titanium, Hardsilver, Dragon Skin, Dark Chestnut, some Adamantite.
IMO, Hallowed anything, is just not worth the effort.