ΔE 11.1, fair: the same colour family, but not a straight swap. Purple Shadow is noticeably lighter, cooler than Amphora Red.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Purple Shadow is noticeably lighter, cooler than Amphora Red.
The same difference applies the other way round: Amphora Red is noticeably darker, 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 Amphora Red on the colour wheel See Purple Shadow on the colour wheel
All matches: Amphora Red equivalents · Purple Shadow equivalents