ΔE 8.2, close: similar, with a visible difference side by side. Dark Green BS381C/641 is a little darker, more saturated than Eshin Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Dark Green BS381C/641 is a little darker, more saturated than Eshin Grey.
The same difference applies the other way round: Eshin Grey 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 Eshin Grey on the colour wheel See Dark Green BS381C/641 on the colour wheel
All matches: Eshin Grey equivalents · Dark Green BS381C/641 equivalents