ΔE 11.8, fair: the same colour family, but not a straight swap. Dark DAK Sand is more saturated, cooler than Denison Tan Base.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Dark DAK Sand is more saturated, cooler than Denison Tan Base.
The same difference applies the other way round: Denison Tan Base is more muted, 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 Denison Tan Base on the colour wheel See Dark DAK Sand on the colour wheel
All matches: Denison Tan Base equivalents · Dark DAK Sand equivalents