ΔE 10.9, fair: the same colour family, but not a straight swap. Niblet Green is a little lighter, more muted than Eternal Hunt.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Niblet Green is a little lighter, more muted than Eternal Hunt.
The same difference applies the other way round: Eternal Hunt is a little darker, 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 Eternal Hunt on the colour wheel See Niblet Green on the colour wheel
All matches: Eternal Hunt equivalents · Niblet Green equivalents