ΔE 15.5, loose: different enough that you should pick on purpose. Toxic Yellow is a little lighter, much more saturated than Creamy Ivory.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Toxic Yellow is a little lighter, much more saturated than Creamy Ivory.
The same difference applies the other way round: Creamy Ivory is a little darker, much more muted.
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 Creamy Ivory on the colour wheel See Toxic Yellow on the colour wheel
All matches: Creamy Ivory equivalents · Toxic Yellow equivalents