ΔE 6.8, close: similar, with a visible difference side by side. Dark Green (IJA) is more muted, warmer than Temple Gate Teal.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Dark Green (IJA) is more muted, warmer than Temple Gate Teal.
The same difference applies the other way round: Temple Gate Teal is 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 Temple Gate Teal on the colour wheel See Dark Green (IJA) on the colour wheel
All matches: Temple Gate Teal equivalents · Dark Green (IJA) equivalents