ΔE 41.3, loose: different enough that you should pick on purpose. Violet Wash is a little lighter, much more saturated, cooler than Hellion Red Wash.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 41). Violet Wash is a little lighter, much more saturated, cooler than Hellion Red Wash.
The same difference applies the other way round: Hellion Red Wash is a little darker, much more muted, 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.
See Hellion Red Wash on the colour wheel See Violet Wash on the colour wheel
All matches: Hellion Red Wash equivalents · Violet Wash equivalents