Cloudburst Blue vs Dark Turquoise

How close are they?

ΔE 27.0, loose: different enough that you should pick on purpose. Dark Turquoise is a little lighter, cooler than Cloudburst Blue.

Can I use Dark Turquoise instead of Cloudburst Blue?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Dark Turquoise is a little lighter, cooler than Cloudburst Blue.

Can I use Cloudburst Blue instead of Dark Turquoise?

The same difference applies the other way round: Cloudburst Blue is a little darker, 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.