ΔE 19.0, loose: different enough that you should pick on purpose. Natural Flesh is noticeably lighter, much more saturated, warmer than Morghast Bone.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Natural Flesh is noticeably lighter, much more saturated, warmer than Morghast Bone.
The same difference applies the other way round: Morghast Bone is noticeably darker, much more muted, cooler.
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 Morghast Bone on the colour wheel See Natural Flesh on the colour wheel
All matches: Morghast Bone equivalents · Natural Flesh equivalents