Blue Violet vs Warpfiend Grey

How close are they?

ΔE 14.0, fair: the same colour family, but not a straight swap. Warpfiend Grey is much more muted than Blue Violet.

Can I use Warpfiend Grey instead of Blue Violet?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Warpfiend Grey is much more muted than Blue Violet.

Can I use Blue Violet instead of Warpfiend Grey?

The same difference applies the other way round: Blue Violet is much more saturated.

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.