ΔE 12.4, fair: the same colour family, but not a straight swap. Primary Magenta is a little darker, more saturated than Blood Chalice.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Primary Magenta is a little darker, more saturated than Blood Chalice.
The same difference applies the other way round: Blood Chalice is a little lighter, more muted.
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 Blood Chalice on the colour wheel See Primary Magenta on the colour wheel
All matches: Blood Chalice equivalents · Primary Magenta equivalents