ΔE 11.0, fair: the same colour family, but not a straight swap. Etherium Blue is more muted, cooler than Lilac.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Etherium Blue is more muted, cooler than Lilac.
The same difference applies the other way round: Lilac is more saturated, 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 Lilac on the colour wheel See Etherium Blue on the colour wheel
All matches: Lilac equivalents · Etherium Blue equivalents