ΔE 13.0, fair: the same colour family, but not a straight swap. Purple Hex is much more muted, cooler than Bloodfest Crimson.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Purple Hex is much more muted, cooler than Bloodfest Crimson.
The same difference applies the other way round: Bloodfest Crimson is much more saturated, 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 Bloodfest Crimson on the colour wheel See Purple Hex on the colour wheel
All matches: Bloodfest Crimson equivalents · Purple Hex equivalents