Vicious Purple vs Blue Wash

How close are they?

ΔE 31.4, loose: different enough that you should pick on purpose. Blue Wash is noticeably lighter, more muted, cooler than Vicious Purple.

Can I use Blue Wash instead of Vicious Purple?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 31). Blue Wash is noticeably lighter, more muted, cooler than Vicious Purple.

Can I use Vicious Purple instead of Blue Wash?

The same difference applies the other way round: Vicious Purple is noticeably darker, 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.