ΔE 16.9, loose: different enough that you should pick on purpose. Phalanx Blue is a little darker, much more saturated than AMT-7 Light Blue.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Phalanx Blue is a little darker, much more saturated than AMT-7 Light Blue.
The same difference applies the other way round: AMT-7 Light Blue is a little lighter, much more muted.
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 AMT-7 Light Blue on the colour wheel See Phalanx Blue on the colour wheel
All matches: AMT-7 Light Blue equivalents · Phalanx Blue equivalents