Pinky Blue vs Beetle Green

How close are they?

ΔE 15.5, loose: different enough that you should pick on purpose. Beetle Green is a little darker, more saturated, warmer than Pinky Blue.

Can I use Beetle Green instead of Pinky Blue?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Beetle Green is a little darker, more saturated, warmer than Pinky Blue.

Can I use Pinky Blue instead of Beetle Green?

The same difference applies the other way round: Pinky Blue is a little lighter, more muted, cooler.

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.