Coven Purple vs Faded Plum

How close are they?

ΔE 19.5, loose: different enough that you should pick on purpose. Faded Plum is noticeably lighter, much more muted, warmer than Coven Purple.

Can I use Faded Plum instead of Coven Purple?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Faded Plum is noticeably lighter, much more muted, warmer than Coven Purple.

Can I use Coven Purple instead of Faded Plum?

The same difference applies the other way round: Coven Purple is noticeably darker, much more saturated, 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.