User blog comment:Takeshi kun21/What is your Name?: Guide to Naming Your RWBY OC/@comment-1827503-20180319023814


 * ...while Ren argues they should be called Team RNJR (Ranger) as they are aiding Ruby in her objective. Neither of these names relate to a color in any siginificant way...

RNJR = ranger green, but as you said, only official teams have to follow the rule. If an unofficial team wanted to call themselves JNRR, they could do so.