ΔE 18.9, loose: different enough that you should pick on purpose. Light Pink is a little darker, more muted, warmer than Tentacle Pink.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Light Pink is a little darker, more muted, warmer than Tentacle Pink.
The same difference applies the other way round: Tentacle Pink is a little lighter, 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 Tentacle Pink on the colour wheel See Light Pink on the colour wheel
All matches: Tentacle Pink equivalents · Light Pink equivalents