Chaos Bronze vs Amber Green

How close are they?

ΔE 28.6, loose: different enough that you should pick on purpose. Amber Green is noticeably darker, much more saturated, cooler than Chaos Bronze.

Can I use Amber Green instead of Chaos Bronze?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 29). Amber Green is noticeably darker, much more saturated, cooler than Chaos Bronze.

Can I use Chaos Bronze instead of Amber Green?

The same difference applies the other way round: Chaos Bronze is noticeably lighter, much more muted, 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.