IJN D1 Deep Green Black vs Dryad Bark

How close are they?

ΔE 7.3, close: similar, with a visible difference side by side. Dryad Bark is a little darker than IJN D1 Deep Green Black.

Can I use Dryad Bark instead of IJN D1 Deep Green Black?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Dryad Bark is a little darker than IJN D1 Deep Green Black.

Can I use IJN D1 Deep Green Black instead of Dryad Bark?

The same difference applies the other way round: IJN D1 Deep Green Black is a little lighter.

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.