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