ΔE 19.2, loose: different enough that you should pick on purpose. Blue is noticeably lighter, much more saturated, cooler than Bad Bruise.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Blue is noticeably lighter, much more saturated, cooler than Bad Bruise.
The same difference applies the other way round: Bad Bruise is noticeably darker, much 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 Bad Bruise on the colour wheel See Blue on the colour wheel
All matches: Bad Bruise equivalents · Blue equivalents