ΔE 14.3, fair: the same colour family, but not a straight swap. Magenta Blood is a little lighter, cooler than Primary Red.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Magenta Blood is a little lighter, cooler than Primary Red.
The same difference applies the other way round: Primary Red is a little darker, 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 Primary Red on the colour wheel See Magenta Blood on the colour wheel
All matches: Primary Red equivalents · Magenta Blood equivalents