ΔE 19.2, loose: different enough that you should pick on purpose. Electric Blue is noticeably lighter, more saturated, warmer than Field Blue.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Electric Blue is noticeably lighter, more saturated, warmer than Field Blue.
The same difference applies the other way round: Field Blue is noticeably darker, more muted, 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 Field Blue on the colour wheel See Electric Blue on the colour wheel
All matches: Field Blue equivalents · Electric Blue equivalents