ΔE 15.2, loose: different enough that you should pick on purpose. Ultramarines Blue is more saturated, cooler than Hive Dweller Purple.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Ultramarines Blue is more saturated, cooler than Hive Dweller Purple.
The same difference applies the other way round: Hive Dweller Purple is more muted, 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.
See Hive Dweller Purple on the colour wheel See Ultramarines Blue on the colour wheel
All matches: Hive Dweller Purple equivalents · Ultramarines Blue equivalents