ΔE 9.6, close: similar, with a visible difference side by side. Ghoul Skin is a little darker, more saturated than Desert Olive Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Ghoul Skin is a little darker, more saturated than Desert Olive Green.
The same difference applies the other way round: Desert Olive Green 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.
See Desert Olive Green on the colour wheel See Ghoul Skin on the colour wheel
All matches: Desert Olive Green equivalents · Ghoul Skin equivalents