British Sand Yellow vs Yellow Dune

How close are they?

ΔE 6.2, close: similar, with a visible difference side by side. Yellow Dune is more muted than British Sand Yellow.

Can I use Yellow Dune instead of British Sand Yellow?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Yellow Dune is more muted than British Sand Yellow.

Can I use British Sand Yellow instead of Yellow Dune?

The same difference applies the other way round: British Sand Yellow is 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.