ΔE 14.5, fair: the same colour family, but not a straight swap. Plague Brown is a little lighter, much more saturated than Yellow Oxide.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Plague Brown is a little lighter, much more saturated than Yellow Oxide.
The same difference applies the other way round: Yellow Oxide is a little darker, much more muted.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Yellow Oxide on the colour wheel See Plague Brown on the colour wheel
All matches: Yellow Oxide equivalents · Plague Brown equivalents