ΔE 10.1, fair: the same colour family, but not a straight swap. Amaranth Red is a little lighter, more muted than Character Red.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Amaranth Red is a little lighter, more muted than Character Red.
The same difference applies the other way round: Character Red 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 Character Red on the colour wheel See Amaranth Red on the colour wheel
All matches: Character Red equivalents · Amaranth Red equivalents