Druchii Violet vs Hellion Red Wash

How close are they?

ΔE 34.3, loose: different enough that you should pick on purpose. Hellion Red Wash is noticeably lighter, more muted, warmer than Druchii Violet.

Can I use Hellion Red Wash instead of Druchii Violet?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 34). Hellion Red Wash is noticeably lighter, more muted, warmer than Druchii Violet.

Can I use Druchii Violet instead of Hellion Red Wash?

The same difference applies the other way round: Druchii Violet is noticeably 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.