Buff vs Barren Dune

How close are they?

ΔE 8.9, close: similar, with a visible difference side by side. Barren Dune is a little lighter, more saturated than Buff.

Can I use Barren Dune instead of Buff?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Barren Dune is a little lighter, more saturated than Buff.

Can I use Buff instead of Barren Dune?

The same difference applies the other way round: Buff 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.