I crafted a Gwartak Clan Hammer (Item ID: 466691) with T1 blacksmithing and mailed it to my 11 Shaman. In receiving it, I am showing that the stats on it include the Shaman class as permitted and that the Required Level is 6 Adventuring, which I meet as being level 11. However, it is getting the 'red' tint on the icon as if it were an unusable item. The system did go ahead and recognize me as eligible to equip and let me do so, so this red tint is just cosmetically displaying on the icon for no reason.