ΔE 10.8, fair: the same colour family, but not a straight swap. Buff is a little darker, more muted than Light DAK Sand.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Buff is a little darker, more muted than Light DAK Sand.
The same difference applies the other way round: Light DAK Sand is a little lighter, more saturated.
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 DAK Sand on the colour wheel See Buff on the colour wheel
All matches: Light DAK Sand equivalents · Buff equivalents