ΔE 11.5, fair: the same colour family, but not a straight swap. Necrotic Flesh is a little darker, more muted than Duck Egg Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Necrotic Flesh is a little darker, more muted than Duck Egg Green.
The same difference applies the other way round: Duck Egg Green is a little lighter, 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 Duck Egg Green on the colour wheel See Necrotic Flesh on the colour wheel
All matches: Duck Egg Green equivalents · Necrotic Flesh equivalents