ΔE 12.1, fair: the same colour family, but not a straight swap. Grey Knights Steel is a little lighter, more muted than Anodized Violet.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Grey Knights Steel is a little lighter, more muted than Anodized Violet.
The same difference applies the other way round: Anodized Violet is a little darker, 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.
See Anodized Violet on the colour wheel See Grey Knights Steel on the colour wheel
All matches: Anodized Violet equivalents · Grey Knights Steel equivalents