Alpha Blue vs Alien Purple

How close are they?

ΔE 14.0, fair: the same colour family, but not a straight swap. Alien Purple is more saturated, warmer than Alpha Blue.

Can I use Alien Purple instead of Alpha Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Alien Purple is more saturated, warmer than Alpha Blue.

Can I use Alpha Blue instead of Alien Purple?

The same difference applies the other way round: Alpha Blue is 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.