ΔE 13.3, fair: the same colour family, but not a straight swap. Alizarin Crimson is noticeably 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 13). Alizarin Crimson is noticeably darker, more saturated than Blood Chalice.
The same difference applies the other way round: Blood Chalice is noticeably 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 Alizarin Crimson on the colour wheel
All matches: Blood Chalice equivalents · Alizarin Crimson equivalents