ΔE 12.3, fair: the same colour family, but not a straight swap. Dark Earth is noticeably darker, cooler than Charred Bone.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Dark Earth is noticeably darker, cooler than Charred Bone.
The same difference applies the other way round: Charred Bone is noticeably lighter, warmer.
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 Charred Bone on the colour wheel See Dark Earth on the colour wheel
All matches: Charred Bone equivalents · Dark Earth equivalents