ΔE 5.8, very close: most people won’t see a difference side by side. Cockpit Green (IJN) is a little lighter, cooler than Dark Imperial Khaki.
Yes, for most jobs. Very close match (ΔE 6). Cockpit Green (IJN) is a little lighter, cooler than Dark Imperial Khaki.
The same difference applies the other way round: Dark Imperial Khaki 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 Dark Imperial Khaki on the colour wheel See Cockpit Green (IJN) on the colour wheel
All matches: Dark Imperial Khaki equivalents · Cockpit Green (IJN) equivalents