That is White/Black. If you watch the orzhov lore series, you can see its basically the italian mafia. Anything that is white by itself or white and a second color (especially green, blue, or black) is going to be a scary totalitarian group. Red/White is borderline nazi in some ways, but they give some freedom. In Naya, Red and Green together tone down white enough that she stops trying to eliminate freewill, resigning herself to a moral advisor. Naya is the only world not to have white in it and not be messed up in some way (unless you count giant animals stepping on people).
Metis, On a side note, I grew up in the Jehovah’s Witnesses, and just White by itself, tends to decribe the philosophy of that group. I can see Orzhov in the Jehovah’s Witnesses, but Orzhov is more balanced between black and white whereas JW has just a tinge of black in it at most (it does want to kill off the rest of the world one day and convert as many people into the group as possible...but anything with a lot of white could do that.)
Edit: On second thought, I’ll put it this way: the rank and file of Jehovah’s Witnesses is White/Green, but the higher ranked one is in the organization, the more likely people are to be White/Black.
That would make my childhood religion ABZAN, if taken all together.