ΔE 22.1, loose: different enough that you should pick on purpose. Magic Blue is noticeably lighter, more muted, cooler than Blue.
✓ Herrick Games paint comparison chart lists these two as equivalents.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Magic Blue is noticeably lighter, more muted, cooler than Blue.
The same difference applies the other way round: Blue is noticeably darker, more saturated, warmer.
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 Blue on the colour wheel See Magic Blue on the colour wheel
All matches: Blue equivalents · Magic Blue equivalents