ΔE 8.9, close: similar, with a visible difference side by side. Dark Imperial Khaki is cooler than US Interior Yellow Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Dark Imperial Khaki is cooler than US Interior Yellow Green.
The same difference applies the other way round: US Interior Yellow Green is 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 US Interior Yellow Green on the colour wheel See Dark Imperial Khaki on the colour wheel
All matches: US Interior Yellow Green equivalents · Dark Imperial Khaki equivalents