Aggaros Dunes vs Yellow Submarine

How close are they?

ΔE 21.9, loose: different enough that you should pick on purpose. Yellow Submarine is much more saturated, cooler than Aggaros Dunes.

Can I use Yellow Submarine instead of Aggaros Dunes?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Yellow Submarine is much more saturated, cooler than Aggaros Dunes.

Can I use Aggaros Dunes instead of Yellow Submarine?

The same difference applies the other way round: Aggaros Dunes is much 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.