ΔE 8.5, close: similar, with a visible difference side by side. Cam. Middle Brown is a little lighter, warmer than Olivegrove Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Cam. Middle Brown is a little lighter, warmer than Olivegrove Green.
The same difference applies the other way round: Olivegrove Green is a little darker, 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 Olivegrove Green on the colour wheel See Cam. Middle Brown on the colour wheel
All matches: Olivegrove Green equivalents · Cam. Middle Brown equivalents