ΔE 13.3, fair: the same colour family, but not a straight swap. Luftwaffe Green is a little lighter, more muted, warmer than Shadow Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Luftwaffe Green is a little lighter, more muted, warmer than Shadow Green.
The same difference applies the other way round: Shadow Green is a little darker, 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 Shadow Green on the colour wheel See Luftwaffe Green on the colour wheel
All matches: Shadow Green equivalents · Luftwaffe Green equivalents