ΔE 10.6, fair: the same colour family, but not a straight swap. Plague Brown is a little lighter, cooler than Cream Yellow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Plague Brown is a little lighter, cooler than Cream Yellow.
The same difference applies the other way round: Cream Yellow is a little darker, warmer.
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 Cream Yellow on the colour wheel See Plague Brown on the colour wheel
All matches: Cream Yellow equivalents · Plague Brown equivalents