ΔE 8.7, close: similar, with a visible difference side by side. Phoenician Purple is more muted than Witchbane Plum.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Phoenician Purple is more muted than Witchbane Plum.
The same difference applies the other way round: Witchbane Plum is 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 Witchbane Plum on the colour wheel See Phoenician Purple on the colour wheel
All matches: Witchbane Plum equivalents · Phoenician Purple equivalents