ΔE 11.8, fair: the same colour family, but not a straight swap. Catachan Flesh is a little darker, more saturated than Bone Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Catachan Flesh is a little darker, more saturated than Bone Brown.
The same difference applies the other way round: Bone Brown is a little lighter, 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 Bone Brown on the colour wheel See Catachan Flesh on the colour wheel
All matches: Bone Brown equivalents · Catachan Flesh equivalents