ΔE 10.7, fair: the same colour family, but not a straight swap. Necrotic Flesh is a little lighter, more muted, warmer than WWI German Light Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Necrotic Flesh is a little lighter, more muted, warmer than WWI German Light Green.
The same difference applies the other way round: WWI German Light Green is a little darker, more saturated, cooler.
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 WWI German Light Green on the colour wheel See Necrotic Flesh on the colour wheel
All matches: WWI German Light Green equivalents · Necrotic Flesh equivalents