Doom Metal vs Old Gold

How close are they?

ΔE 25.1, loose: different enough that you should pick on purpose. Old Gold is noticeably darker, more saturated than Doom Metal.

Can I use Old Gold instead of Doom Metal?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 25). Old Gold is noticeably darker, more saturated than Doom Metal.

Can I use Doom Metal instead of Old Gold?

The same difference applies the other way round: Doom Metal is noticeably lighter, 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.