Purulent Yellow vs Sand Yellow

How close are they?

ΔE 12.4, fair: the same colour family, but not a straight swap. Sand Yellow is a little darker, more muted, warmer than Purulent Yellow.

Can I use Sand Yellow instead of Purulent Yellow?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Sand Yellow is a little darker, more muted, warmer than Purulent Yellow.

Can I use Purulent Yellow instead of Sand Yellow?

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