Corvus Black vs Nightshade Purple

How close are they?

ΔE 7.7, close: similar, with a visible difference side by side. Nightshade Purple is a little lighter than Corvus Black.

Can I use Nightshade Purple instead of Corvus Black?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Nightshade Purple is a little lighter than Corvus Black.

Can I use Corvus Black instead of Nightshade Purple?

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.