ΔE 14.2, fair: the same colour family, but not a straight swap. Dwarven Skin is a little darker, more muted, warmer than Moonstone Skin.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Dwarven Skin is a little darker, more muted, warmer than Moonstone Skin.
The same difference applies the other way round: Moonstone Skin is a little lighter, more saturated, 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 Moonstone Skin on the colour wheel See Dwarven Skin on the colour wheel
All matches: Moonstone Skin equivalents · Dwarven Skin equivalents