ΔE 11.6, fair: the same colour family, but not a straight swap. Sacred Scarlet is a little lighter, more saturated than Amaranth Red.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Sacred Scarlet is a little lighter, more saturated than Amaranth Red.
The same difference applies the other way round: Amaranth Red is a little darker, more muted.
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 Amaranth Red on the colour wheel See Sacred Scarlet on the colour wheel
All matches: Amaranth Red equivalents · Sacred Scarlet equivalents