ΔE 16.5, loose: different enough that you should pick on purpose. Light Blue Green is a little lighter, warmer than Field Blue.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Light Blue Green is a little lighter, warmer than Field Blue.
The same difference applies the other way round: Field Blue is a little darker, 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 Light Blue Green on the colour wheel
All matches: Field Blue equivalents · Light Blue Green equivalents