ΔE 15.2, loose: different enough that you should pick on purpose. Luftwaffe Green is more muted, warmer than Black Forest Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Luftwaffe Green is more muted, warmer than Black Forest Green.
The same difference applies the other way round: Black Forest Green is 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 Black Forest Green on the colour wheel See Luftwaffe Green on the colour wheel
All matches: Black Forest Green equivalents · Luftwaffe Green equivalents