Corvus Black vs Dark Rust

How close are they?

ΔE 10.9, fair: the same colour family, but not a straight swap. Dark Rust is a little lighter than Corvus Black.

Can I use Dark Rust instead of Corvus Black?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Dark Rust is a little lighter than Corvus Black.

Can I use Corvus Black instead of Dark Rust?

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.