Skullcrusher Brass vs Bullion

How close are they?

ΔE 16.8, loose: different enough that you should pick on purpose. Bullion is a little lighter, more saturated, warmer than Skullcrusher Brass.

Can I use Bullion instead of Skullcrusher Brass?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Bullion is a little lighter, more saturated, warmer than Skullcrusher Brass.

Can I use Skullcrusher Brass instead of Bullion?

The same difference applies the other way round: Skullcrusher Brass is a little darker, more muted, 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.