ΔE 14.0, fair: the same colour family, but not a straight swap. Violet Grey is noticeably darker, more saturated, warmer than Fenrisian Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Violet Grey is noticeably darker, more saturated, warmer than Fenrisian Grey.
The same difference applies the other way round: Fenrisian Grey is noticeably 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 Fenrisian Grey on the colour wheel See Violet Grey on the colour wheel
All matches: Fenrisian Grey equivalents · Violet Grey equivalents