Azurite Hue vs Blue Violet

How close are they?

ΔE 22.0, loose: different enough that you should pick on purpose. Blue Violet is a little darker, more saturated, warmer than Azurite Hue.

Can I use Blue Violet instead of Azurite Hue?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Blue Violet is a little darker, more saturated, warmer than Azurite Hue.

Can I use Azurite Hue instead of Blue Violet?

The same difference applies the other way round: Azurite Hue is a little lighter, 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.