Rust vs Grunge Brown

How close are they?

ΔE 10.1, fair: the same colour family, but not a straight swap. Grunge Brown is a little lighter, more saturated than Rust.

Can I use Grunge Brown instead of Rust?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Grunge Brown is a little lighter, more saturated than Rust.

Can I use Rust instead of Grunge Brown?

The same difference applies the other way round: Rust is a little darker, more muted.

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.