Army Green vs Muddy Olive

How close are they?

ΔE 9.6, close: similar, with a visible difference side by side. Muddy Olive is more saturated, cooler than Army Green.

Can I use Muddy Olive instead of Army Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Muddy Olive is more saturated, cooler than Army Green.

Can I use Army Green instead of Muddy Olive?

The same difference applies the other way round: Army Green is more muted, warmer.

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.