ΔE 12.9, fair: the same colour family, but not a straight swap. Pastel Green is more muted, cooler than Light Imperial Khaki.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Pastel Green is more muted, cooler than Light Imperial Khaki.
The same difference applies the other way round: Light Imperial Khaki is 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 Light Imperial Khaki on the colour wheel See Pastel Green on the colour wheel
All matches: Light Imperial Khaki equivalents · Pastel Green equivalents