Dark Olive Green vs Greatcoat Green

How close are they?

ΔE 11.0, fair: the same colour family, but not a straight swap. Greatcoat Green is noticeably lighter than Dark Olive Green.

Can I use Greatcoat Green instead of Dark Olive Green?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Greatcoat Green is noticeably lighter than Dark Olive Green.

Can I use Dark Olive Green instead of Greatcoat Green?

The same difference applies the other way round: Dark Olive Green is noticeably darker.

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.