Rainfall Blue vs Stormfang

How close are they?

ΔE 11.6, fair: the same colour family, but not a straight swap. Stormfang is more muted, cooler than Rainfall Blue.

Can I use Stormfang instead of Rainfall Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Stormfang is more muted, cooler than Rainfall Blue.

Can I use Rainfall Blue instead of Stormfang?

The same difference applies the other way round: Rainfall Blue is more saturated, 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.