Magenta Wash vs Violet Wash

How close are they?

ΔE 44.4, loose: different enough that you should pick on purpose. Violet Wash is a little lighter, much more muted, cooler than Magenta Wash.

Can I use Violet Wash instead of Magenta Wash?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 44). Violet Wash is a little lighter, much more muted, cooler than Magenta Wash.

Can I use Magenta Wash instead of Violet Wash?

The same difference applies the other way round: Magenta Wash is a little darker, much more saturated, warmer.

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.