Emerald Dimension vs Beetle Green

How close are they?

ΔE 26.2, loose: different enough that you should pick on purpose. Beetle Green is noticeably darker, more saturated, cooler than Emerald Dimension.

Can I use Beetle Green instead of Emerald Dimension?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Beetle Green is noticeably darker, more saturated, cooler than Emerald Dimension.

Can I use Emerald Dimension instead of Beetle Green?

The same difference applies the other way round: Emerald Dimension is noticeably lighter, 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.