ΔE 13.4, fair: the same colour family, but not a straight swap. Hive Dweller Purple is more saturated, warmer than Prussian Blue. They are different kinds of paint: AMMO by Mig Prussian Blue is an opaque base/layer paint and Army Painter Hive Dweller Purple is a one-coat contrast-style paint, so they won’t behave the same on the model even where the colour is close.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Hive Dweller Purple is more saturated, warmer than Prussian Blue. They are different kinds of paint.
The same difference applies the other way round: Prussian Blue is more muted, 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 Prussian Blue on the colour wheel See Hive Dweller Purple on the colour wheel
All matches: Prussian Blue equivalents · Hive Dweller Purple equivalents