ΔE 11.7, fair: the same colour family, but not a straight swap. Buff is a little lighter, more saturated than Mid Khaki Drill.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Buff is a little lighter, more saturated than Mid Khaki Drill.
The same difference applies the other way round: Mid Khaki Drill is a little darker, more muted.
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 Mid Khaki Drill on the colour wheel See Buff on the colour wheel
All matches: Mid Khaki Drill equivalents · Buff equivalents