Violet vs Kakophoni Purple

How close are they?

ΔE 18.5, loose: different enough that you should pick on purpose. Kakophoni Purple is a little lighter, more muted, warmer than Violet.

Can I use Kakophoni Purple instead of Violet?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Kakophoni Purple is a little lighter, more muted, warmer than Violet.

Can I use Violet instead of Kakophoni Purple?

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