Gold vs Bright Gold

How close are they?

ΔE 21.0, loose: different enough that you should pick on purpose. Bright Gold is a little lighter, much more saturated than Gold.

Can I use Bright Gold instead of Gold?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Bright Gold is a little lighter, much more saturated than Gold.

Can I use Gold instead of Bright Gold?

The same difference applies the other way round: Gold is a little darker, much 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.