ΔE 11.8, fair: the same colour family, but not a straight swap. Blue is noticeably darker, cooler than Dead Purple.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Blue is noticeably darker, cooler than Dead Purple.
The same difference applies the other way round: Dead Purple 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 Dead Purple on the colour wheel See Blue on the colour wheel
All matches: Dead Purple equivalents · Blue equivalents