Aztec Gold vs Blighted Gold

How close are they?

ΔE 25.1, loose: different enough that you should pick on purpose. Blighted Gold is noticeably darker, much more muted, cooler than Aztec Gold.

Can I use Blighted Gold instead of Aztec Gold?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 25). Blighted Gold is noticeably darker, much more muted, cooler than Aztec Gold.

Can I use Aztec Gold instead of Blighted Gold?

The same difference applies the other way round: Aztec Gold is noticeably lighter, much more saturated, warmer.

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.