ΔE 12.3, fair: the same colour family, but not a straight swap. Dark Imperial Khaki is noticeably lighter, more saturated, warmer than Atlantic Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Dark Imperial Khaki is noticeably lighter, more saturated, warmer than Atlantic Green.
The same difference applies the other way round: Atlantic Green is noticeably darker, 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 Atlantic Green on the colour wheel See Dark Imperial Khaki on the colour wheel
All matches: Atlantic Green equivalents · Dark Imperial Khaki equivalents