Commando Green vs Dark Emerald

How close are they?

ΔE 8.5, close: similar, with a visible difference side by side. Dark Emerald is a little lighter, more saturated, warmer than Commando Green.

Can I use Dark Emerald instead of Commando Green?

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

Can I use Commando Green instead of Dark Emerald?

The same difference applies the other way round: Commando Green is a little darker, 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.