Poisonous Cloud vs Primary Yellow

How close are they?

ΔE 14.9, fair: the same colour family, but not a straight swap. Primary Yellow is noticeably lighter, more saturated than Poisonous Cloud.

Can I use Primary Yellow instead of Poisonous Cloud?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Primary Yellow is noticeably lighter, more saturated than Poisonous Cloud.

Can I use Poisonous Cloud instead of Primary 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.