Yellow Dune vs Dark Yellow 2

How close are they?

ΔE 13.0, fair: the same colour family, but not a straight swap. Dark Yellow 2 is more muted, cooler than Yellow Dune.

Can I use Dark Yellow 2 instead of Yellow Dune?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Dark Yellow 2 is more muted, cooler than Yellow Dune.

Can I use Yellow Dune instead of Dark Yellow 2?

The same difference applies the other way round: Yellow Dune is more saturated, 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.