ΔE 11.1, fair: the same colour family, but not a straight swap. Violet is more muted, warmer than Prussian Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Violet is more muted, warmer than Prussian Blue.
The same difference applies the other way round: Prussian Blue 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 Prussian Blue on the colour wheel See Violet on the colour wheel
All matches: Prussian Blue equivalents · Violet equivalents