ΔE 15.0, fair: the same colour family, but not a straight swap. IDF/IAF Green is a little darker, much more muted, cooler than Nurgling Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). IDF/IAF Green is a little darker, much more muted, cooler than Nurgling Green.
The same difference applies the other way round: Nurgling Green is a little lighter, much 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 Nurgling Green on the colour wheel See IDF/IAF Green on the colour wheel
All matches: Nurgling Green equivalents · IDF/IAF Green equivalents