ΔE 9.5, close: similar, with a visible difference side by side. Grotesque Green is more muted, warmer than Light Gray Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Grotesque Green is more muted, warmer than Light Gray Green.
The same difference applies the other way round: Light Gray Green is more saturated, 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 Light Gray Green on the colour wheel See Grotesque Green on the colour wheel
All matches: Light Gray Green equivalents · Grotesque Green equivalents