Dark Green vs Sybarite Green

How close are they?

ΔE 8.1, close: similar, with a visible difference side by side. Sybarite Green is more saturated, cooler than Dark Green.

Can I use Sybarite Green instead of Dark Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Sybarite Green is more saturated, cooler than Dark Green.

Can I use Dark Green instead of Sybarite Green?

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