ΔE 12.7, fair: the same colour family, but not a straight swap. Dirty Grey is a little darker, warmer than Ogryn Camo.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Dirty Grey is a little darker, warmer than Ogryn Camo.
The same difference applies the other way round: Ogryn Camo is a little lighter, 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 Ogryn Camo on the colour wheel See Dirty Grey on the colour wheel
All matches: Ogryn Camo equivalents · Dirty Grey equivalents