Light Green vs Olive Drab

How close are they?

ΔE 8.6, close: similar, with a visible difference side by side. Olive Drab is more muted than Light Green.

Can I use Olive Drab instead of Light Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Olive Drab is more muted than Light Green.

Can I use Light Green instead of Olive Drab?

The same difference applies the other way round: Light Green is 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.