ΔE 15.0, fair: the same colour family, but not a straight swap. Light Skin is noticeably lighter, more saturated, warmer than Ionrach Skin.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Light Skin is noticeably lighter, more saturated, warmer than Ionrach Skin.
The same difference applies the other way round: Ionrach Skin is noticeably darker, 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 Ionrach Skin on the colour wheel See Light Skin on the colour wheel
All matches: Ionrach Skin equivalents · Light Skin equivalents