ΔE 8.8, close: similar, with a visible difference side by side. Olive Green is more muted than Green Morkshroom.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Olive Green is more muted than Green Morkshroom.
The same difference applies the other way round: Green Morkshroom 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.
See Green Morkshroom on the colour wheel See Olive Green on the colour wheel
All matches: Green Morkshroom equivalents · Olive Green equivalents