Tainted Gold vs Ancient Gold

How close are they?

ΔE 22.9, loose: different enough that you should pick on purpose. Ancient Gold is a little darker, much more muted than Tainted Gold.

Can I use Ancient Gold instead of Tainted Gold?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Ancient Gold is a little darker, much more muted than Tainted Gold.

Can I use Tainted Gold instead of Ancient Gold?

The same difference applies the other way round: Tainted Gold is a little lighter, much more saturated.

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.