Grey Brown vs Administratum Grey

How close are they?

ΔE 9.3, close: similar, with a visible difference side by side. Administratum Grey is more muted than Grey Brown.

Can I use Administratum Grey instead of Grey Brown?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Administratum Grey is more muted than Grey Brown.

Can I use Grey Brown instead of Administratum Grey?

The same difference applies the other way round: Grey Brown 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.