ΔE 12.8, fair: the same colour family, but not a straight swap. Olive Brown is a little darker, more muted than Cryx Bane Base.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Olive Brown is a little darker, more muted than Cryx Bane Base.
The same difference applies the other way round: Cryx Bane Base is a little lighter, 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 Cryx Bane Base on the colour wheel See Olive Brown on the colour wheel
All matches: Cryx Bane Base equivalents · Olive Brown equivalents