ΔE 27.1, loose: different enough that you should pick on purpose. Blueberry is a little lighter, more muted, cooler than Violet Volt.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Blueberry is a little lighter, more muted, cooler than Violet Volt.
The same difference applies the other way round: Violet Volt is a little darker, 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.
See Violet Volt on the colour wheel See Blueberry on the colour wheel
All matches: Violet Volt equivalents · Blueberry equivalents