Scarab Green vs Emerald Green

How close are they?

ΔE 8.4, close: similar, with a visible difference side by side. Emerald Green is more saturated, warmer than Scarab Green.

Can I use Emerald Green instead of Scarab Green?

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

Can I use Scarab Green instead of Emerald Green?

The same difference applies the other way round: Scarab Green is more muted, cooler.

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.