ΔE 14.9, fair: the same colour family, but not a straight swap. Spectral Purple is noticeably lighter, more muted than Kakophoni Purple.
✓ Two Thin Coats comparison chart lists these two as equivalents.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Spectral Purple is noticeably lighter, more muted than Kakophoni Purple.
The same difference applies the other way round: Kakophoni Purple is noticeably 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 Kakophoni Purple on the colour wheel See Spectral Purple on the colour wheel
All matches: Kakophoni Purple equivalents · Spectral Purple equivalents