ΔE 14.8, fair: the same colour family, but not a straight swap. Fern Green is much more muted, warmer than Pine Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Fern Green is much more muted, warmer than Pine Green.
The same difference applies the other way round: Pine Green is much 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 Pine Green on the colour wheel See Fern Green on the colour wheel
All matches: Pine Green equivalents · Fern Green equivalents