ΔE 13.8, fair: the same colour family, but not a straight swap. Hexed Lichen is a little darker, more muted, warmer than Alien Purple.
✓ Herrick Games paint comparison chart lists these two as equivalents.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Hexed Lichen is a little darker, more muted, warmer than Alien Purple.
The same difference applies the other way round: Alien Purple is a little lighter, more saturated, 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 Alien Purple on the colour wheel See Hexed Lichen on the colour wheel
All matches: Alien Purple equivalents · Hexed Lichen equivalents