ΔE 18.0, loose: different enough that you should pick on purpose. Electric Blue is a little lighter, more muted than Primary Blue.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Electric Blue is a little lighter, more muted than Primary Blue.
The same difference applies the other way round: Primary Blue is a little darker, 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 Primary Blue on the colour wheel See Electric Blue on the colour wheel
All matches: Primary Blue equivalents · Electric Blue equivalents