ΔE 13.6, fair: the same colour family, but not a straight swap. Wicked Purple is noticeably darker, more saturated than Grey Mist.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Wicked Purple is noticeably darker, more saturated than Grey Mist.
The same difference applies the other way round: Grey Mist is noticeably lighter, 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 Grey Mist on the colour wheel See Wicked Purple on the colour wheel
All matches: Grey Mist equivalents · Wicked Purple equivalents