ΔE 14.8, fair: the same colour family, but not a straight swap. Medium Flesh is a little lighter, more muted than Sacred Scarlet.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Medium Flesh is a little lighter, more muted than Sacred Scarlet.
The same difference applies the other way round: Sacred Scarlet 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 Sacred Scarlet on the colour wheel See Medium Flesh on the colour wheel
All matches: Sacred Scarlet equivalents · Medium Flesh equivalents