ΔE 13.4, fair: the same colour family, but not a straight swap. Salmon Rose is a little lighter, more muted than Sekigahara.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Salmon Rose is a little lighter, more muted than Sekigahara.
The same difference applies the other way round: Sekigahara 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 Sekigahara on the colour wheel See Salmon Rose on the colour wheel
All matches: Sekigahara equivalents · Salmon Rose equivalents