ΔE 13.3, fair: the same colour family, but not a straight swap. Lucius Lilac is noticeably darker, more saturated, cooler than Dead Pink.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Lucius Lilac is noticeably darker, more saturated, cooler than Dead Pink.
The same difference applies the other way round: Dead Pink is noticeably lighter, 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 Dead Pink on the colour wheel See Lucius Lilac on the colour wheel
All matches: Dead Pink equivalents · Lucius Lilac equivalents