ΔE 11.7, fair: the same colour family, but not a straight swap. Amaranth Red is a little lighter, more muted than Primary Magenta.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Amaranth Red is a little lighter, more muted than Primary Magenta.
The same difference applies the other way round: Primary Magenta is a little darker, more saturated.
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 Magenta on the colour wheel See Amaranth Red on the colour wheel
All matches: Primary Magenta equivalents · Amaranth Red equivalents