Ahriman Blue vs Marine Blue

How close are they?

ΔE 16.4, loose: different enough that you should pick on purpose. Marine Blue is a little darker, warmer than Ahriman Blue.

Can I use Marine Blue instead of Ahriman Blue?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Marine Blue is a little darker, warmer than Ahriman Blue.

Can I use Ahriman Blue instead of Marine Blue?

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