ΔE 13.2, fair: the same colour family, but not a straight swap. Shadow Green is a little darker, more saturated than Unforgiven Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Shadow Green is a little darker, more saturated than Unforgiven Green.
The same difference applies the other way round: Unforgiven Green is a little lighter, more muted.
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 Unforgiven Green on the colour wheel See Shadow Green on the colour wheel
All matches: Unforgiven Green equivalents · Shadow Green equivalents