ΔE 9.5, close: similar, with a visible difference side by side. IJN Deep Dark Green is a little lighter, cooler than Black Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). IJN Deep Dark Green is a little lighter, cooler than Black Green.
The same difference applies the other way round: Black Green is a little darker, 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 Black Green on the colour wheel See IJN Deep Dark Green on the colour wheel
All matches: Black Green equivalents · IJN Deep Dark Green equivalents