ΔE 9.4, close: similar, with a visible difference side by side. Dark Green is more saturated, warmer than IJA Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Dark Green is more saturated, warmer than IJA Green.
The same difference applies the other way round: IJA Green is more muted, 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 Green on the colour wheel See Dark Green on the colour wheel
All matches: IJA Green equivalents · Dark Green equivalents