ΔE 12.2, fair: the same colour family, but not a straight swap. Light Blue Green is a little darker, more muted than Phantasmal Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Light Blue Green is a little darker, more muted than Phantasmal Blue.
The same difference applies the other way round: Phantasmal Blue is a little lighter, 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 Phantasmal Blue on the colour wheel See Light Blue Green on the colour wheel
All matches: Phantasmal Blue equivalents · Light Blue Green equivalents