Duck Blue vs Ahriman Blue

How close are they?

ΔE 10.9, fair: the same colour family, but not a straight swap. Ahriman Blue is a little darker, more muted than Duck Blue.

Can I use Ahriman Blue instead of Duck Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Ahriman Blue is a little darker, more muted than Duck Blue.

Can I use Duck Blue instead of Ahriman Blue?

The same difference applies the other way round: Duck Blue is a little lighter, more saturated.

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.