Green Blue vs Phalanx Blue

How close are they?

ΔE 12.9, fair: the same colour family, but not a straight swap. Phalanx Blue is more saturated, cooler than Green Blue.

Can I use Phalanx Blue instead of Green Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Phalanx Blue is more saturated, cooler than Green Blue.

Can I use Green Blue instead of Phalanx Blue?

The same difference applies the other way round: Green Blue is more muted, warmer.

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.