White Knights are the weakest knights in runescape and found mainly in their castle. The helmet's plume colour indicates the knight's level. They seem to have identical armour as the Temple knights while differing significantly in combat level, as seen here, when comparing them as seen in Ritual of the Mahjarratquest.
Plume colour
Rank
Combat level
Red
Initiate
50
Yellow
Proselyte
50
Green
Acolyte
50
Blue
Partisan
50
The White knights still wear the "old" version of white armour. It isn't mentioned that they will soon have the new version, although it is highly likely that they will be updated, along with the Black Knights. This will most likely happen with the release of the two Sir Owen quests, as Al-Kharid and the Wizards' Tower received NPC and location updates after the release of the Ozan and Ariana quests. Players can wear white armour after the "Wanted!" quest. The NPC White Knights' platebodies seem to have a thin black trim around the shoulders.
Different levelled knights have slightly different drops. Players killing white knights in the white knight's castle after completing the Wanted! quest will lose favour among the White Knights' order.
There was a lone white knight scout standing outside of Burthorpe, the only area of Asgarnia controlled by the Imperial Guard rather than the White Knights. Players who spoke to him learned that he was watching something. The knight was removed on 31 January2012 with the Troll Warzone update.