ΔE 11.1, fair: the same colour family, but not a straight swap. Lavender is a little lighter, more saturated than Xereus Purple.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Lavender is a little lighter, more saturated than Xereus Purple.
The same difference applies the other way round: Xereus Purple is a little darker, more muted.
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 Xereus Purple on the colour wheel See Lavender on the colour wheel
All matches: Xereus Purple equivalents · Lavender equivalents