Purulent Yellow vs Deep Yellow

How close are they?

ΔE 13.3, fair: the same colour family, but not a straight swap. Deep Yellow is a little darker, more saturated than Purulent Yellow.

Can I use Deep Yellow instead of Purulent Yellow?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Deep Yellow is a little darker, more saturated than Purulent Yellow.

Can I use Purulent Yellow instead of Deep Yellow?

The same difference applies the other way round: Purulent Yellow is a little lighter, 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.