Runelord Brass vs Dark Copper

How close are they?

ΔE 24.5, loose: different enough that you should pick on purpose. Dark Copper is a little lighter, much more muted, warmer than Runelord Brass.

Can I use Dark Copper instead of Runelord Brass?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 25). Dark Copper is a little lighter, much more muted, warmer than Runelord Brass.

Can I use Runelord Brass instead of Dark Copper?

The same difference applies the other way round: Runelord Brass is a little darker, much more saturated, cooler.

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.