ΔE 14.3, fair: the same colour family, but not a straight swap. Old Rose is a little lighter, more saturated than Reddish Flesh.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Old Rose is a little lighter, more saturated than Reddish Flesh.
The same difference applies the other way round: Reddish Flesh is a little darker, more muted.
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 Reddish Flesh on the colour wheel See Old Rose on the colour wheel
All matches: Reddish Flesh equivalents · Old Rose equivalents