ΔE 35.5, loose: different enough that you should pick on purpose. Paralyze Blue is noticeably lighter, more muted, cooler than Shyish Purple.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 35). Paralyze Blue is noticeably lighter, more muted, cooler than Shyish Purple.
The same difference applies the other way round: Shyish 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.
See Shyish Purple on the colour wheel See Paralyze Blue on the colour wheel
All matches: Shyish Purple equivalents · Paralyze Blue equivalents