Ogre Green vs Army Green

How close are they?

ΔE 7.0, close: similar, with a visible difference side by side. Army Green is a little darker, more muted than Ogre Green.

Can I use Army Green instead of Ogre Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Army Green is a little darker, more muted than Ogre Green.

Can I use Ogre Green instead of Army Green?

The same difference applies the other way round: Ogre Green is a little lighter, more saturated.

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.