ΔE 9.6, close: similar, with a visible difference side by side. Dark Drab is a little lighter, more muted, warmer than IJA #27 Ao Midori iro (Blue- Green).
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Dark Drab is a little lighter, more muted, warmer than IJA #27 Ao Midori iro (Blue- Green).
The same difference applies the other way round: IJA #27 Ao Midori iro (Blue- 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 IJA #27 Ao Midori iro (Blue- Green) on the colour wheel See Dark Drab on the colour wheel
All matches: IJA #27 Ao Midori iro (Blue- Green) equivalents · Dark Drab equivalents