ΔE 11.4, fair: the same colour family, but not a straight swap. Light Imperial Khaki is a little lighter, more muted, cooler than Grey Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Light Imperial Khaki is a little lighter, more muted, cooler than Grey Green.
The same difference applies the other way round: Grey Green is a little darker, more saturated, 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 Grey Green on the colour wheel See Light Imperial Khaki on the colour wheel
All matches: Grey Green equivalents · Light Imperial Khaki equivalents