ΔE 16.4, loose: different enough that you should pick on purpose. Hexed Lichen is a little darker, more saturated, warmer than Twilight Purple.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Hexed Lichen is a little darker, more saturated, warmer than Twilight Purple.
The same difference applies the other way round: Twilight Purple 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 Twilight Purple on the colour wheel See Hexed Lichen on the colour wheel
All matches: Twilight Purple equivalents · Hexed Lichen equivalents