ΔE 6.0, close: similar, with a visible difference side by side. Violet Grey is a little lighter than Panzer Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Violet Grey is a little lighter than Panzer Grey.
The same difference applies the other way round: Panzer Grey is a little darker.
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 Panzer Grey on the colour wheel See Violet Grey on the colour wheel
All matches: Panzer Grey equivalents · Violet Grey equivalents