Corvus Black vs Glossy Sea Blue

How close are they?

ΔE 6.5, close: similar, with a visible difference side by side. Glossy Sea Blue is a little lighter than Corvus Black.

Can I use Glossy Sea Blue instead of Corvus Black?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Glossy Sea Blue is a little lighter than Corvus Black.

Can I use Corvus Black instead of Glossy Sea Blue?

The same difference applies the other way round: Corvus Black 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.