ΔE 14.7, fair: the same colour family, but not a straight swap. Cloudy Sky is noticeably lighter, cooler than Ionrach Skin.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Cloudy Sky is noticeably lighter, cooler than Ionrach Skin.
The same difference applies the other way round: Ionrach Skin is noticeably darker, warmer.
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 Cloudy Sky on the colour wheel
All matches: Ionrach Skin equivalents · Cloudy Sky equivalents