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