ΔE 17.8, loose: different enough that you should pick on purpose. Blue Violet is much more muted, warmer than Character Blue.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Blue Violet is much more muted, warmer than Character Blue.
The same difference applies the other way round: Character Blue is much 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 Character Blue on the colour wheel See Blue Violet on the colour wheel
All matches: Character Blue equivalents · Blue Violet equivalents