Faded Ultramarine vs Lustful Purple

How close are they?

ΔE 16.2, loose: different enough that you should pick on purpose. Lustful Purple is a little lighter, warmer than Faded Ultramarine.

Can I use Lustful Purple instead of Faded Ultramarine?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Lustful Purple is a little lighter, warmer than Faded Ultramarine.

Can I use Faded Ultramarine instead of Lustful Purple?

The same difference applies the other way round: Faded Ultramarine is a little darker, 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.