ΔE 8.0, close: similar, with a visible difference side by side. Spectral Blue is more muted, warmer than Phalanx Blue.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Spectral Blue is more muted, warmer than Phalanx Blue.
The same difference applies the other way round: Phalanx Blue is more saturated, 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 Phalanx Blue on the colour wheel See Spectral Blue on the colour wheel
All matches: Phalanx Blue equivalents · Spectral Blue equivalents