Ogre Green vs Olive Drab

How close are they?

ΔE 10.5, fair: the same colour family, but not a straight swap. Olive Drab is a little lighter, warmer than Ogre Green.

Can I use Olive Drab instead of Ogre Green?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Olive Drab is a little lighter, warmer than Ogre Green.

Can I use Ogre Green instead of Olive Drab?

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