ΔE 18.3, loose: different enough that you should pick on purpose. Weird Elixir is much more muted, warmer than Tentacle Pink.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Weird Elixir is much more muted, warmer than Tentacle Pink.
The same difference applies the other way round: Tentacle Pink is much 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 Weird Elixir on the colour wheel
All matches: Tentacle Pink equivalents · Weird Elixir equivalents