Gold vs Runelord Brass

How close are they?

ΔE 16.6, loose: different enough that you should pick on purpose. Runelord Brass is a little darker, more muted, cooler than Gold.

Can I use Runelord Brass instead of Gold?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Runelord Brass is a little darker, more muted, cooler than Gold.

Can I use Gold instead of Runelord Brass?

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