ΔE 8.5, close: similar, with a visible difference side by side. Steel Blue is a little darker, more saturated than Dark Gray (Dunkel Grau).
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Steel Blue is a little darker, more saturated than Dark Gray (Dunkel Grau).
The same difference applies the other way round: Dark Gray (Dunkel Grau) 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 Dark Gray (Dunkel Grau) on the colour wheel See Steel Blue on the colour wheel
All matches: Dark Gray (Dunkel Grau) equivalents · Steel Blue equivalents