ΔE 13.7, fair: the same colour family, but not a straight swap. Tesla Blue is a little darker, more saturated, cooler than Cultist Purple.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Tesla Blue is a little darker, more saturated, cooler than Cultist Purple.
The same difference applies the other way round: Cultist Purple is a little lighter, more muted, 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 Cultist Purple on the colour wheel See Tesla Blue on the colour wheel
All matches: Cultist Purple equivalents · Tesla Blue equivalents