ΔE 10.6, fair: the same colour family, but not a straight swap. Intermediate Green is more muted, cooler than Light Green (Luftwaffe).
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Intermediate Green is more muted, cooler than Light Green (Luftwaffe).
The same difference applies the other way round: Light Green (Luftwaffe) is more saturated, warmer.
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 Light Green (Luftwaffe) on the colour wheel See Intermediate Green on the colour wheel
All matches: Light Green (Luftwaffe) equivalents · Intermediate Green equivalents