ΔE 11.5, fair: the same colour family, but not a straight swap. Lapislazuli is a little lighter, more saturated, cooler than Broodmother Purple.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Lapislazuli is a little lighter, more saturated, cooler than Broodmother Purple.
The same difference applies the other way round: Broodmother Purple is a little darker, 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 Broodmother Purple on the colour wheel See Lapislazuli on the colour wheel
All matches: Broodmother Purple equivalents · Lapislazuli equivalents