ΔE 15.6, loose: different enough that you should pick on purpose. is a little darker, much more muted than Moonstone Alchemy.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). is a little darker, much more muted than Moonstone Alchemy.
The same difference applies the other way round: Moonstone Alchemy is a little lighter, much 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 Moonstone Alchemy on the colour wheel See on the colour wheel
All matches: Moonstone Alchemy equivalents · equivalents