ΔE 28.8, loose: different enough that you should pick on purpose. Ink Blue is noticeably darker, more muted, cooler than Blue Ink.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 29). Ink Blue is noticeably darker, more muted, cooler than Blue Ink.
The same difference applies the other way round: Blue Ink is noticeably lighter, 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 Blue Ink on the colour wheel See Ink Blue on the colour wheel
All matches: Blue Ink equivalents · Ink Blue equivalents