Administratum Grey vs Medium Sea Grey

How close are they?

ΔE 9.8, close: similar, with a visible difference side by side. Medium Sea Grey is a little darker than Administratum Grey.

Can I use Medium Sea Grey instead of Administratum Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Medium Sea Grey is a little darker than Administratum Grey.

Can I use Administratum Grey instead of Medium Sea Grey?

The same difference applies the other way round: Administratum Grey is a little lighter.

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.