Extra Dark Green vs Dryad Bark

How close are they?

ΔE 9.3, close: similar, with a visible difference side by side. Dryad Bark is more muted than Extra Dark Green.

Can I use Dryad Bark instead of Extra Dark Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Dryad Bark is more muted than Extra Dark Green.

Can I use Extra Dark Green instead of Dryad Bark?

The same difference applies the other way round: Extra Dark Green 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.