ΔE 14.9, fair: the same colour family, but not a straight swap. Splinter Green is a little darker, more muted, warmer than Forest of Shadows.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Splinter Green is a little darker, more muted, warmer than Forest of Shadows.
The same difference applies the other way round: Forest of Shadows is a little lighter, 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 Forest of Shadows on the colour wheel See Splinter Green on the colour wheel
All matches: Forest of Shadows equivalents · Splinter Green equivalents