Aluminium vs Bright Brass (Met.)

How close are they?

ΔE 26.2, loose: different enough that you should pick on purpose. Bright Brass (Met.) is noticeably lighter, more saturated than Aluminium.

Can I use Bright Brass (Met.) instead of Aluminium?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Bright Brass (Met.) is noticeably lighter, more saturated than Aluminium.

Can I use Aluminium instead of Bright Brass (Met.)?

The same difference applies the other way round: Aluminium is noticeably darker, 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.