Cygnar Blue Highlight vs Alien Purple

How close are they?

ΔE 14.7, fair: the same colour family, but not a straight swap. Alien Purple is warmer than Cygnar Blue Highlight.

Can I use Alien Purple instead of Cygnar Blue Highlight?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Alien Purple is warmer than Cygnar Blue Highlight.

Can I use Cygnar Blue Highlight instead of Alien Purple?

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