Lupercal Green vs Olive Green

How close are they?

ΔE 8.0, close: similar, with a visible difference side by side. Olive Green is more muted, warmer than Lupercal Green.

Can I use Olive Green instead of Lupercal Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Olive Green is more muted, warmer than Lupercal Green.

Can I use Lupercal Green instead of Olive Green?

The same difference applies the other way round: Lupercal Green is more saturated, 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.