ΔE 12.9, fair: the same colour family, but not a straight swap. Bosh Chestnut is a little darker, more muted than Catachan Flesh.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Bosh Chestnut is a little darker, more muted than Catachan Flesh.
The same difference applies the other way round: Catachan Flesh 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 Catachan Flesh on the colour wheel See Bosh Chestnut on the colour wheel
All matches: Catachan Flesh equivalents · Bosh Chestnut equivalents