ΔE 13.3, fair: the same colour family, but not a straight swap. Emperor's Children is a little darker, more saturated, warmer than Lilac.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Emperor's Children is a little darker, more saturated, warmer than Lilac.
The same difference applies the other way round: Lilac is a little lighter, more muted, cooler.
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 Lilac on the colour wheel See Emperor's Children on the colour wheel
All matches: Lilac equivalents · Emperor's Children equivalents