ΔE 12.0, fair: the same colour family, but not a straight swap. Flat Flesh is a little darker, warmer than Beige Pink.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Flat Flesh is a little darker, warmer than Beige Pink.
The same difference applies the other way round: Beige Pink is a little lighter, 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 Beige Pink on the colour wheel See Flat Flesh on the colour wheel
All matches: Beige Pink equivalents · Flat Flesh equivalents