ΔE 11.0, fair: the same colour family, but not a straight swap. Khaki Brown is a little darker, warmer than Medium Olive Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Khaki Brown is a little darker, warmer than Medium Olive Green.
The same difference applies the other way round: Medium Olive Green is a little lighter, 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 Medium Olive Green on the colour wheel See Khaki Brown on the colour wheel
All matches: Medium Olive Green equivalents · Khaki Brown equivalents