ΔE 10.3, fair: the same colour family, but not a straight swap. Oxidation Green is a little lighter, more saturated than Ironclad Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Oxidation Green is a little lighter, more saturated than Ironclad Grey.
The same difference applies the other way round: Ironclad Grey is a little darker, 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 Ironclad Grey on the colour wheel See Oxidation Green on the colour wheel
All matches: Ironclad Grey equivalents · Oxidation Green equivalents