Rust vs Beret Maroon

How close are they?

ΔE 12.4, fair: the same colour family, but not a straight swap. Beret Maroon is noticeably darker, more muted than Rust.

Can I use Beret Maroon instead of Rust?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Beret Maroon is noticeably darker, more muted than Rust.

Can I use Rust instead of Beret Maroon?

The same difference applies the other way round: Rust is noticeably lighter, 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.