Those little tidbits of lore that you believe, yet aren't mentioned anywhere. Be it by deduction or just made up, they are non-contradictory of established lore and they don't interfere with anything major.
I believe that Quel'thalas' Ranger-Generals have blue uniforms and its part of the position. Both Sylvanas and Halduron wear blue armor, even when it doesn't make sense from a camouflaging perspective, even Vereesa wears blue as R-G of the Silver Covenant (Maybe as a sign of respect of high elven traditions) when she used to wear green.
So, what are your headcanons? The highest the level pf plausibility, the better!