ΔE 26.3, loose: different enough that you should pick on purpose. Ivory Light is noticeably lighter, much more muted than Toxic Mist.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Ivory Light is noticeably lighter, much more muted than Toxic Mist.
The same difference applies the other way round: Toxic Mist is noticeably darker, much more saturated.
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 Toxic Mist on the colour wheel See Ivory Light on the colour wheel
All matches: Toxic Mist equivalents · Ivory Light equivalents