ΔE 18.4, loose: different enough that you should pick on purpose. Ink Violet is more muted, cooler than Clear Plum.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Ink Violet is more muted, cooler than Clear Plum.
The same difference applies the other way round: Clear Plum is 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 Clear Plum on the colour wheel See Ink Violet on the colour wheel
All matches: Clear Plum equivalents · Ink Violet equivalents