Light Rust vs Phalanx Yellow

How close are they?

ΔE 10.5, fair: the same colour family, but not a straight swap. Phalanx Yellow is a little lighter, cooler than Light Rust.

Can I use Phalanx Yellow instead of Light Rust?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Phalanx Yellow is a little lighter, cooler than Light Rust.

Can I use Light Rust instead of Phalanx Yellow?

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

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.