Tainted Gold vs Runelord Brass

How close are they?

ΔE 9.8, close: similar, with a visible difference side by side. Runelord Brass is more muted, cooler than Tainted Gold.

Can I use Runelord Brass instead of Tainted Gold?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Runelord Brass is more muted, cooler than Tainted Gold.

Can I use Tainted Gold instead of Runelord Brass?

The same difference applies the other way round: Tainted Gold is 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.