Dark Net vs Brass

How close are they?

ΔE 22.6, loose: different enough that you should pick on purpose. Brass is a little lighter, much more saturated than Dark Net.

Can I use Brass instead of Dark Net?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Brass is a little lighter, much more saturated than Dark Net.

Can I use Dark Net instead of Brass?

The same difference applies the other way round: Dark Net 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.