ΔE 14.1, fair: the same colour family, but not a straight swap. Aged Metal is a little lighter, more saturated, warmer than Grave Robber.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Aged Metal is a little lighter, more saturated, warmer than Grave Robber.
The same difference applies the other way round: Grave Robber is a little darker, 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 Grave Robber on the colour wheel See Aged Metal on the colour wheel
All matches: Grave Robber equivalents · Aged Metal equivalents