ΔE 15.0, fair: the same colour family, but not a straight swap. Prussian Blue Hue is a little darker, much more muted than Asurmen Blue. They are different kinds of paint: Citadel Asurmen Blue is a one-coat contrast-style paint and Golden Prussian Blue Hue is an ink, glaze or transparent 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 15). Prussian Blue Hue is a little darker, much more muted than Asurmen Blue. They are different kinds of paint.
The same difference applies the other way round: Asurmen Blue is a little lighter, much 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.
See Asurmen Blue on the colour wheel See Prussian Blue Hue on the colour wheel
All matches: Asurmen Blue equivalents · Prussian Blue Hue equivalents