ΔE 23.1, loose: different enough that you should pick on purpose. Ink Sepia is a little lighter, more muted, warmer than Night Blue INK.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Ink Sepia is a little lighter, more muted, warmer than Night Blue INK.
The same difference applies the other way round: Night Blue INK is a little 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.
See Night Blue INK on the colour wheel See Ink Sepia on the colour wheel
All matches: Night Blue INK equivalents · Ink Sepia equivalents