From Halopedia, the Halo wiki
oh and also, what page of GoO does it say its gray? i just want to check. and is it the most recent reprint of GoO that you saw this in?
but like i said, that spartan on the fanart pic is green not gray. the bright lighting just makes him look grey
oh yeah i almost forgot. that image isnt even exactly needed. it doesnt compose 50% of the article's merit or anything so nothing much is lost if it is removed. i dont know why you want to keep it so bad.
the spi armor in the fanart is green too so i dont know why you would use it if "Kurt is grey." and before you say the fanart is grey, the bright lighting just makes it look so.