Dark Olive vs Carthalos Skin

How close are they?

ΔE 6.8, close: similar, with a visible difference side by side. Carthalos Skin is a little darker, more saturated than Dark Olive.

Can I use Carthalos Skin instead of Dark Olive?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Carthalos Skin is a little darker, more saturated than Dark Olive.

Can I use Dark Olive instead of Carthalos Skin?

The same difference applies the other way round: Dark Olive is a little lighter, more muted.

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.