Dark Rust vs Flat Earth

How close are they?

ΔE 13.6, fair: the same colour family, but not a straight swap. Flat Earth is a little lighter, more muted, warmer than Dark Rust.

Can I use Flat Earth instead of Dark Rust?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Flat Earth is a little lighter, more muted, warmer than Dark Rust.

Can I use Dark Rust instead of Flat Earth?

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

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.