ΔE 13.4, fair: the same colour family, but not a straight swap. Dark Magenta is a little lighter, more muted, cooler than Astorath Red.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Dark Magenta is a little lighter, more muted, cooler than Astorath Red.
The same difference applies the other way round: Astorath Red is a little darker, 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 Astorath Red on the colour wheel See Dark Magenta on the colour wheel
All matches: Astorath Red equivalents · Dark Magenta equivalents