ΔE 14.0, fair: the same colour family, but not a straight swap. Nocturnal Red is much more muted than Carmine Blades.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Nocturnal Red is much more muted than Carmine Blades.
The same difference applies the other way round: Carmine Blades is much 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 Carmine Blades on the colour wheel See Nocturnal Red on the colour wheel
All matches: Carmine Blades equivalents · Nocturnal Red equivalents