ΔE 14.4, fair: the same colour family, but not a straight swap. Dark Sand is much more saturated, warmer than Khaki.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Dark Sand is much more saturated, warmer than Khaki.
The same difference applies the other way round: Khaki is much 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 Khaki on the colour wheel See Dark Sand on the colour wheel
All matches: Khaki equivalents · Dark Sand equivalents