AMT-12 Dark Grey vs Scarab Green

How close are they?

ΔE 6.7, close: similar, with a visible difference side by side. Scarab Green is more saturated than AMT-12 Dark Grey.

Can I use Scarab Green instead of AMT-12 Dark Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Scarab Green is more saturated than AMT-12 Dark Grey.

Can I use AMT-12 Dark Grey instead of Scarab Green?

The same difference applies the other way round: AMT-12 Dark Grey is more muted.

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.