ΔE 6.8, close: similar, with a visible difference side by side. Steel Helmet Green is more muted than Field Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Steel Helmet Green is more muted than Field Green.
The same difference applies the other way round: Field Green 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 Field Green on the colour wheel See Steel Helmet Green on the colour wheel
All matches: Field Green equivalents · Steel Helmet Green equivalents