ΔE 12.9, fair: the same colour family, but not a straight swap. Dark Eternal Night is a little darker, more muted than Iron Wolf.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Dark Eternal Night is a little darker, more muted than Iron Wolf.
The same difference applies the other way round: Iron Wolf 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 Iron Wolf on the colour wheel See Dark Eternal Night on the colour wheel
All matches: Iron Wolf equivalents · Dark Eternal Night equivalents