ΔE 11.4, fair: the same colour family, but not a straight swap. Aircraft Gray Green BS283 is a little darker, 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 11). Aircraft Gray Green BS283 is a little darker, more muted, cooler than Nurgling Green.
The same difference applies the other way round: Nurgling Green is a little lighter, 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 Aircraft Gray Green BS283 on the colour wheel
All matches: Nurgling Green equivalents · Aircraft Gray Green BS283 equivalents