ΔE 10.6, fair: the same colour family, but not a straight swap. Light Rust is more muted, warmer than Burnt Offering.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Light Rust is more muted, warmer than Burnt Offering.
The same difference applies the other way round: Burnt Offering is 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.
See Burnt Offering on the colour wheel See Light Rust on the colour wheel
All matches: Burnt Offering equivalents · Light Rust equivalents