ΔE 9.3, close: similar, with a visible difference side by side. Cam. Black Brown is more muted than Steel Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Cam. Black Brown is more muted than Steel Grey.
The same difference applies the other way round: Steel Grey 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 Steel Grey on the colour wheel See Cam. Black Brown on the colour wheel
All matches: Steel Grey equivalents · Cam. Black Brown equivalents