You guys have it so easy! You just pick one color and stick with it. I have to keep about a hundred npcs using consistent colors. I may give up on that soon, and switch to a system where the FIRST npc is always the same color no matter who it is, the SECOND is always the same, and so forth. That could get a bit confusing if the same two npcs were in two consecutive posts and they both spoke, but in the opposite order. hmmmmmmm......