Gold Dust Woman vs Dorn Yellow

How close are they?

ΔE 15.1, loose: different enough that you should pick on purpose. Dorn Yellow is more saturated, cooler than Gold Dust Woman.

Can I use Dorn Yellow instead of Gold Dust Woman?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Dorn Yellow is more saturated, cooler than Gold Dust Woman.

Can I use Gold Dust Woman instead of Dorn Yellow?

The same difference applies the other way round: Gold Dust Woman is more muted, warmer.

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.