Darth Blue vs Amethyst Purple

How close are they?

ΔE 13.3, fair: the same colour family, but not a straight swap. Amethyst Purple is more saturated, warmer than Darth Blue.

Can I use Amethyst Purple instead of Darth Blue?

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

Can I use Darth Blue instead of Amethyst Purple?

The same difference applies the other way round: Darth 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.