ΔE 8.2, close: similar, with a visible difference side by side. Olive Green is a little darker, warmer than Evergreen Fog.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Olive Green is a little darker, warmer than Evergreen Fog.
The same difference applies the other way round: Evergreen Fog is a little lighter, 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.
See Evergreen Fog on the colour wheel See Olive Green on the colour wheel
All matches: Evergreen Fog equivalents · Olive Green equivalents