ΔE 11.9, fair: the same colour family, but not a straight swap. Krieg Khaki is noticeably lighter, more muted than Grey Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Krieg Khaki is noticeably lighter, more muted than Grey Green.
The same difference applies the other way round: Grey Green is noticeably darker, more saturated.
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 Grey Green on the colour wheel See Krieg Khaki on the colour wheel
All matches: Grey Green equivalents · Krieg Khaki equivalents