ΔE 10.7, fair: the same colour family, but not a straight swap. Mud Brown is a little lighter, more muted than Carnelian Skin.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Mud Brown is a little lighter, more muted than Carnelian Skin.
The same difference applies the other way round: Carnelian Skin is a little darker, 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 Carnelian Skin on the colour wheel See Mud Brown on the colour wheel
All matches: Carnelian Skin equivalents · Mud Brown equivalents