How old is that FoW, because on Old Old monk FoW it dyes more white than it does on the new version (Haven't tested or confirmed, but that's what I was told, which makes sense as it worked that way for Mesmer FoW too.)
Got bored, so here's a couple dye previews; male armor, but dyes the same really. This is the new armor so... I'd try to find someone who's got an older set.
Hmm sorry, I thought those combination would have worked.
White dye was introduced at the same time as the new dye system, which was release a few day before NighFall (Zara has ZB, so it was post-NF), then either that combination was done before NF, that means without without white dye or it was done after NF, then we have to search for that dye XD.
I think I remember the OP's screenie being something like yellows and silvers when there was no white but am not sure. You could try white+white+white+yellow or something.......I doubt you can get that anymore tho. It's too bad.