ΔE 16.6, loose: different enough that you should pick on purpose. C.P. Cadmium Yellow Medium is a little lighter, more saturated, warmer than Poisonous Cloud.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). C.P. Cadmium Yellow Medium is a little lighter, more saturated, warmer than Poisonous Cloud.
The same difference applies the other way round: Poisonous Cloud is a little darker, more muted, 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 Poisonous Cloud on the colour wheel See C.P. Cadmium Yellow Medium on the colour wheel
All matches: Poisonous Cloud equivalents · C.P. Cadmium Yellow Medium equivalents