ΔE 12.0, fair: the same colour family, but not a straight swap. IJA Light Grey Green is more muted, cooler than Necrotic Flesh.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). IJA Light Grey Green is more muted, cooler than Necrotic Flesh.
The same difference applies the other way round: Necrotic Flesh is more saturated, 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 Necrotic Flesh on the colour wheel See IJA Light Grey Green on the colour wheel
All matches: Necrotic Flesh equivalents · IJA Light Grey Green equivalents