Midnight Olive vs Extra Dark Green

How close are they?

ΔE 8.5, close: similar, with a visible difference side by side. Extra Dark Green is a little darker, warmer than Midnight Olive.

Can I use Extra Dark Green instead of Midnight Olive?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Extra Dark Green is a little darker, warmer than Midnight Olive.

Can I use Midnight Olive instead of Extra Dark Green?

The same difference applies the other way round: Midnight Olive is a little lighter, 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.