Violet Coven vs Lilac Purple

How close are they?

ΔE 20.0, loose: different enough that you should pick on purpose. Lilac Purple is a little darker, much more saturated, warmer than Violet Coven.

Can I use Lilac Purple instead of Violet Coven?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Lilac Purple is a little darker, much more saturated, warmer than Violet Coven.

Can I use Violet Coven instead of Lilac Purple?

The same difference applies the other way round: Violet Coven is a little lighter, much 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.