ΔE 12.3, fair: the same colour family, but not a straight swap. Count of Tuscany is a little lighter, more saturated than Moonstone Skin.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Count of Tuscany is a little lighter, more saturated than Moonstone Skin.
The same difference applies the other way round: Moonstone Skin 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 Moonstone Skin on the colour wheel See Count of Tuscany on the colour wheel
All matches: Moonstone Skin equivalents · Count of Tuscany equivalents