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