ΔE 10.4, fair: the same colour family, but not a straight swap. Fern Green is more muted than Death World Forest.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Fern Green is more muted than Death World Forest.
The same difference applies the other way round: Death World Forest is 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 Death World Forest on the colour wheel See Fern Green on the colour wheel
All matches: Death World Forest equivalents · Fern Green equivalents