Sharpnel Red vs Light Rust

How close are they?

ΔE 13.1, fair: the same colour family, but not a straight swap. Light Rust is noticeably lighter, more muted than Sharpnel Red.

Can I use Light Rust instead of Sharpnel Red?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Light Rust is noticeably lighter, more muted than Sharpnel Red.

Can I use Sharpnel Red instead of Light Rust?

The same difference applies the other way round: Sharpnel Red is noticeably darker, 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.