ΔE 12.1, fair: the same colour family, but not a straight swap. Purple Shadow is a little lighter, more muted than Shadow Red.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Purple Shadow is a little lighter, more muted than Shadow Red.
The same difference applies the other way round: Shadow 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 Shadow Red on the colour wheel See Purple Shadow on the colour wheel
All matches: Shadow Red equivalents · Purple Shadow equivalents