Poisonous Cloud vs Bismuth Vanadate Yellow

How close are they?

ΔE 16.4, loose: different enough that you should pick on purpose. Bismuth Vanadate Yellow is noticeably lighter, more saturated than Poisonous Cloud.

Can I use Bismuth Vanadate Yellow instead of Poisonous Cloud?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Bismuth Vanadate Yellow is noticeably lighter, more saturated than Poisonous Cloud.

Can I use Poisonous Cloud instead of Bismuth Vanadate Yellow?

The same difference applies the other way round: Poisonous Cloud is noticeably darker, 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.