Buckskin Pale vs Dark Sand

How close are they?

ΔE 6.0, close: similar, with a visible difference side by side. Dark Sand is a little darker, more muted than Buckskin Pale.

Can I use Dark Sand instead of Buckskin Pale?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Dark Sand is a little darker, more muted than Buckskin Pale.

Can I use Buckskin Pale instead of Dark Sand?

The same difference applies the other way round: Buckskin Pale 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.