ΔE 11.8, fair: the same colour family, but not a straight swap. Warlock Purple is a little darker, more muted than Fuchsia.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Warlock Purple is a little darker, more muted than Fuchsia.
The same difference applies the other way round: Fuchsia is a little lighter, 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 Fuchsia on the colour wheel See Warlock Purple on the colour wheel
All matches: Fuchsia equivalents · Warlock Purple equivalents