ΔE 3.6, very close: most people won’t see a difference side by side. Dark Drab is a little lighter, warmer than IJN D2 Green Black.
Yes, for most jobs. Very close match (ΔE 4). Dark Drab is a little lighter, warmer than IJN D2 Green Black.
The same difference applies the other way round: IJN D2 Green Black is a little darker, 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 IJN D2 Green Black on the colour wheel See Dark Drab on the colour wheel
All matches: IJN D2 Green Black equivalents · Dark Drab equivalents