ΔE 24.6, loose: different enough that you should pick on purpose. Blue Base is noticeably darker, cooler than Hexed Violet.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 25). Blue Base is noticeably darker, cooler than Hexed Violet.
The same difference applies the other way round: Hexed Violet is noticeably lighter, 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 Hexed Violet on the colour wheel See Blue Base on the colour wheel
All matches: Hexed Violet equivalents · Blue Base equivalents