Question: are jedi sentinels grey jedi?
Answer: The Jedi Sentinel were a sub-sect of the Jedi Order that sought a balance between the two extremes of the Jedi, the Jedi Consulars and the Jedi Guardians. ... A Sentinel's default lightsaber color was yellow, but—like guardian Jedi and consular Jedi—the choice of color was up to the preference of the individual.